network/squid: Updated for version 3.1.20.

Also added --disable-strict-error-checking to configure options
to fix build on 14.0

Signed-off-by: Robby Workman <rworkman@slackbuilds.org>

1 files changed, 244 insertions, 95 deletions

diff --git a/network/squid/squid.conf.documented b/network/squid/squid.conf.documented
index 4dc84c53cc..3efcd48cda 100644
--- a/network/squid/squid.conf.documented
+++ b/network/squid/squid.conf.documented
@@ -1,21 +1,27 @@
-#	WELCOME TO SQUID 3.1.12
+#	WELCOME TO SQUID 3.1.20
 #	----------------------------
-#
-#	This is the default Squid configuration file. You may wish
-#	to look at the Squid home page (http://www.squid-cache.org/)
-#	for the FAQ and other documentation.
-#
-#	The default Squid config file shows what the defaults for
-#	various options happen to be.  If you don't need to change the
-#	default, you shouldn't uncomment the line.  Doing so may cause
-#	run-time problems.  In some cases "none" refers to no default
-#	setting at all, while in other cases it refers to a valid
-#	option - the comments for that keyword indicate if this is the
-#	case.
+#	
+#	This is the documentation for the Squid configuration file.
+#	This documentation can also be found online at:
+#		http://www.squid-cache.org/Doc/config/
+#	
+#	You may wish to look at the Squid home page and wiki for the
+#	FAQ and other documentation:
+#		http://www.squid-cache.org/
+#		http://wiki.squid-cache.org/SquidFaq
+#		http://wiki.squid-cache.org/ConfigExamples
+#	
+#	This documentation shows what the defaults for various directives
+#	happen to be.  If you don't need to change the default, you should
+#	leave the line out of your squid.conf in most cases.
+#	
+#	In some cases "none" refers to no default setting at all,
+#	while in other cases it refers to the value of the option
+#	- the comments for that keyword indicate if this is the case.
 #
 
 #  Configuration options can be included using the "include" directive.
-#  Include takes a list of files to include. Quoting and wildcards is
+#  Include takes a list of files to include. Quoting and wildcards are
 #  supported.
 #
 #  For example,
@@ -38,6 +44,9 @@
 # none
 
 #  TAG: incoming_rate
+#Default:
+# none
+
 #  TAG: server_http11
 #	Remove this line. HTTP/1.1 is supported by default.
 #Default:
@@ -384,9 +393,8 @@
 #			cached entry should be initiated without needing to
 #			wait for a new reply. (default 0 for no grace period)
 #	  protocol=2.5	Compatibility mode for Squid-2.5 external acl helpers
-#	  ipv4 / ipv6	IP-mode used to communicate to this helper.
-#			For compatability with older configurations and helpers
-#			the default is currently 'ipv4'.
+#	  ipv4 / ipv6	IP protocol used to communicate with this helper.
+#			The default is to auto-detect IPv6 and use it when available.
 #
 #	FORMAT specifications
 #
@@ -425,6 +433,9 @@
 #	  		list separator. ; can be any non-alphanumeric
 #			character.
 #
+#	  %%		The percent sign. Useful for helpers which need
+#			an unchanging input format.
+#
 #	In addition to the above, any string specified in the referencing
 #	acl will also be included in the helper request line, after the
 #	specified formats (see the "acl external" directive)
@@ -474,8 +485,9 @@
 #
 #	When using "file", the file should contain one item per line.
 #
-#	By default, regular expressions are CASE-SENSITIVE.  To make
-#	them case-insensitive, use the -i option.
+#	By default, regular expressions are CASE-SENSITIVE.
+#	To make them case-insensitive, use the -i option. To return case-sensitive
+#	use the +i option between patterns, or make a new ACL line without -i.
 #
 #	Some acl types require suspending the current request in order
 #	to access some external data source.
@@ -918,18 +930,23 @@ http_access deny all
 # htcp_clr_access deny all
 
 #  TAG: miss_access
-#	Use to force your neighbors to use you as a sibling instead of
-#	a parent.  For example:
+#	Determins whether network access is permitted when satisfying a request.
+#
+#	For example;
+#	    to force your neighbors to use you as a sibling instead of
+#	    a parent.
 #
 #		acl localclients src 172.16.0.0/16
 #		miss_access allow localclients
 #		miss_access deny  !localclients
 #
-#	This means only your local clients are allowed to fetch
-#	MISSES and all other clients can only fetch HITS.
+#	This means only your local clients are allowed to fetch relayed/MISS
+#	replies from the network and all other clients can only fetch cached
+#	objects (HITs).
+#
 #
-#	By default, allow all clients who passed the http_access rules
-#	to fetch MISSES from us.
+#	The default for this setting allows all clients who passed the
+#	http_access rules to relay via this proxy.
 #
 #	This clause only supports fast acl types.
 #	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
@@ -1046,14 +1063,16 @@ http_access deny all
 #			accelerators should consider the default.
 #			Implies accel.
 #
-#	   vhost	Accelerator mode using Host header for virtual
-#			domain support. Implies accel.
+#	   vhost	Accelerator mode using Host header for virtual domain support.
+#			Also uses the port as specified in Host: header unless
+#			overridden by the vport option. Implies accel.
 #
-#	   vport	Accelerator with IP based virtual host support.
-#			Implies accel.
+#	   vport	Virtual host port support. Using the http_port number
+#			instead of the port passed on Host: headers. Implies accel.
 #
-#	   vport=NN	As above, but uses specified port number rather
-#			than the http_port number. Implies accel.
+#	   vport=NN	Virtual host port support. Using the specified port
+#			number instead of the port passed on Host: headers.
+#			Implies accel.
 #
 #	   protocol=	Protocol to reconstruct accelerated requests with.
 #			Defaults to http.
@@ -1165,6 +1184,10 @@ http_port 3128
 #			    4	TLSv1 only
 #
 #	   cipher=	Colon separated list of supported ciphers.
+#			NOTE: some ciphers such as EDH ciphers depend on
+#			      additional settings. If those settings are
+#			      omitted the ciphers may be silently ignored
+#			      by the OpenSSL library.
 #
 #	   options=	Various SSL engine options. The most important
 #			being:
@@ -1173,8 +1196,8 @@ http_port 3128
 #			    NO_TLSv1  Disallow the use of TLSv1
 #			    SINGLE_DH_USE Always create a new key when using
 #				      temporary/ephemeral DH key exchanges
-#			See src/ssl_support.c or OpenSSL SSL_CTX_set_options
-#			documentation for a complete list of options.
+#			See OpenSSL SSL_CTX_set_options documentation for a
+#			complete list of options.
 #
 #	   clientca=	File containing the list of CAs to use when
 #			requesting a client certificate.
@@ -1191,7 +1214,10 @@ http_port 3128
 #			the capath. Implies VERIFY_CRL flag below.
 #
 #	   dhparams=	File containing DH parameters for temporary/ephemeral
-#			DH key exchanges.
+#			DH key exchanges. See OpenSSL documentation for details
+#			on how to create this file.
+#			WARNING: EDH ciphers will be silently disabled if this
+#				 option is not set.
 #
 #	   sslflags=	Various flags modifying the use of SSL:
 #			    DELAYED_AUTH
@@ -1213,6 +1239,25 @@ http_port 3128
 #
 #	   sslcontext=	SSL session ID context identifier.
 #
+#	   generate-host-certificates[=<on|off>]
+#			Dynamically create SSL server certificates for the
+#			destination hosts of bumped CONNECT requests.When 
+#			enabled, the cert and key options are used to sign
+#			generated certificates. Otherwise generated
+#			certificate will be selfsigned.
+#			If there is CA certificate life time of generated 
+#			certificate equals lifetime of CA certificate. If
+#			generated certificate is selfsigned lifetime is three 
+#			years.
+#			This option is enabled by default when SslBump is used.
+#			See the sslBump option above for more information.
+#			
+#	   dynamic_cert_mem_cache_size=SIZE
+#			Approximate total RAM size spent on cached generated
+#			certificates. If set to zero, caching is disabled. The
+#			default value is 4MB. An average XXX-bit certificate
+#			consumes about XXX bytes of RAM.
+#
 #	   vport	Accelerator with IP based virtual host support.
 #
 #	   vport=NN	As above, but uses specified port number rather
@@ -1482,9 +1527,9 @@ http_port 3128
 #
 #	By default, no requests are bumped.
 #
-#	See also: http_port sslBump
+#	See also: http_port ssl-bump
 #   
-#	This clause only supports fast acl types.
+#	This clause supports both fast and slow acl types.
 #	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #
 #
@@ -1556,6 +1601,31 @@ http_port 3128
 #Default:
 # none
 
+#OPTIONS RELATING TO EXTERNAL SSL_CRTD 
+#-----------------------------------------------------------------------------
+
+#  TAG: sslcrtd_program
+# Note: This option is only available if Squid is rebuilt with the
+#       -DUSE_SSL_CRTD define
+#
+#	Specify the location and options of the executable for ssl_crtd process.
+#	/usr/libexec/ssl_crtd program requires -s and -M parameters
+#	For more information use:
+#		/usr/libexec/ssl_crtd -h
+#Default:
+# sslcrtd_program /usr/libexec/ssl_crtd -s /var/log/squid/lib/ssl_db -M 4MB
+
+#  TAG: sslcrtd_children
+# Note: This option is only available if Squid is rebuilt with the
+#       -DUSE_SSL_CRTD define
+#
+#	The maximum number of processes spawn to service ssl server.
+#	The maximum this may be safely set to is 32.
+#	
+#	You must have at least one ssl_crtd process.
+#Default:
+# sslcrtd_children 5
+
 # OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM
 # -----------------------------------------------------------------------------
 
@@ -1572,7 +1642,7 @@ http_port 3128
 #	cache_peer parent.foo.net       parent    3128  3130  default
 #	cache_peer sib1.foo.net         sibling   3128  3130  proxy-only
 #	cache_peer sib2.foo.net         sibling   3128  3130  proxy-only
-#	cache_peer example.com          parent    80       0  no-query default
+#	cache_peer example.com          parent    80       0  default
 #	cache_peer cdn.example.com      sibling   3128     0  
 #	
 #	      type:	either 'parent', 'sibling', or 'multicast'.
@@ -1667,7 +1737,7 @@ http_port 3128
 #	multicast-siblings
 #			To be used only for cache peers of type "multicast".
 #			ALL members of this multicast group have "sibling"
-#			relationship with it, not "parent".  This is to a mulicast
+#			relationship with it, not "parent".  This is to a multicast
 #			group when the requested object would be fetched only from
 #			a "parent" cache, anyway.  It's useful, e.g., when
 #			configuring a pool of redundant Squid proxies, being
@@ -1959,11 +2029,13 @@ http_port 3128
 #	be handled directly by this cache.  In other words, use this
 #	to not query neighbor caches for certain objects.  You may
 #	list this option multiple times.
-#	Note: never_direct overrides this option.
 #
-
-# We recommend you to use at least the following line.
-hierarchy_stoplist cgi-bin ?
+#	Example:
+#		hierarchy_stoplist cgi-bin ?
+#
+#	Note: never_direct overrides this option.
+#Default:
+# none
 
 # MEMORY CACHE OPTIONS
 # -----------------------------------------------------------------------------
@@ -2201,6 +2273,9 @@ hierarchy_stoplist cgi-bin ?
 # maximum_object_size 4096 KB
 
 #  TAG: cache_swap_low	(percent, 0-100)
+#Default:
+# cache_swap_low 90
+
 #  TAG: cache_swap_high	(percent, 0-100)
 #
 #	The low- and high-water marks for cache object replacement.
@@ -2214,7 +2289,6 @@ hierarchy_stoplist cgi-bin ?
 #	hundreds of MB. If this is the case you may wish to set these
 #	numbers closer together.
 #Default:
-# cache_swap_low 90
 # cache_swap_high 95
 
 # LOGFILE OPTIONS
@@ -2256,6 +2330,8 @@ hierarchy_stoplist cgi-bin ?
 #		<A	Server IP address or peer name
 #		la	Local IP address (http_port)
 #		lp	Local port number (http_port)
+#		<la	Local IP address of the last server or peer connection
+#		<lp     Local port number of the last server or peer connection
 #		ts	Seconds since epoch
 #		tu	subsecond time (milliseconds)
 #		tl	Local time. Optional strftime format argument
@@ -2363,6 +2439,7 @@ hierarchy_stoplist cgi-bin ?
 #	Will log to the specified file using the specified format (which
 #	must be defined in a logformat directive) those entries which match
 #	ALL the acl's specified (which must be defined in acl clauses).
+#
 #	If no acl is specified, all requests will be logged to this file.
 #
 #	To disable logging of a request use the filepath "none", in which case
@@ -2840,10 +2917,10 @@ coredump_dir /var/log/squid/cache
 # -----------------------------------------------------------------------------
 
 #  TAG: url_rewrite_program
-#	Specify the location of the executable for the URL rewriter.
+#	Specify the location of the executable URL rewriter to use.
 #	Since they can perform almost any function there isn't one included.
 #
-#	For each requested URL rewriter will receive on line with the format
+#	For each requested URL, the rewriter will receive on line with the format
 #
 #	URL <SP> client_ip "/" fqdn <SP> user <SP> method [<SP> kvpairs]<NL>
 #
@@ -2857,7 +2934,7 @@ coredump_dir /var/log/squid/cache
 #
 #	The rewriter can also indicate that a client-side redirect should
 #	be performed to the new URL. This is done by prefixing the returned
-#	URL with "301:" (moved permanently) or 302: (moved temporarily).
+#	URL with "301:" (moved permanently) or 302: (moved temporarily), etc.
 #
 #	By default, a URL rewriter is not used.
 #Default:
@@ -3046,7 +3123,13 @@ refresh_pattern -i (/cgi-bin/|\?) 0	0%	0
 refresh_pattern .		0	20%	4320
 
 #  TAG: quick_abort_min	(KB)
+#Default:
+# quick_abort_min 16 KB
+
 #  TAG: quick_abort_max	(KB)
+#Default:
+# quick_abort_max 16 KB
+
 #  TAG: quick_abort_pct	(percent)
 #	The cache by default continues downloading aborted requests
 #	which are almost completed (less than 16 KB remaining). This
@@ -3075,8 +3158,6 @@ refresh_pattern .		0	20%	4320
 #	If you want retrievals to always continue if they are being
 #	cached set 'quick_abort_min' to '-1 KB'.
 #Default:
-# quick_abort_min 16 KB
-# quick_abort_max 16 KB
 # quick_abort_pct 95
 
 #  TAG: read_ahead_gap	buffer-size
@@ -3252,10 +3333,10 @@ refresh_pattern .		0	20%	4320
 # Note: This option is only available if Squid is rebuilt with the
 #       --enable-follow-x-forwarded-for and --enable-icap-client option
 #
-#   Controls whether the indirect client address
-#   (see follow_x_forwarded_for) instead of the
-#   direct client address is passed to an ICAP
-#   server as "X-Client-IP".
+#	Controls whether the indirect client IP address (instead of the direct
+#	client IP address) is passed to adaptation services.
+#
+#	See also: follow_x_forwarded_for adaptation_send_client_ip
 #Default:
 # icap_uses_indirect_client on
 
@@ -3537,7 +3618,7 @@ refresh_pattern .		0	20%	4320
 # read_timeout 15 minutes
 
 #  TAG: request_timeout
-#	How long to wait for an HTTP request after initial
+#	How long to wait for complete HTTP request headers after initial
 #	connection establishment.
 #Default:
 # request_timeout 5 minutes
@@ -3730,7 +3811,13 @@ refresh_pattern .		0	20%	4320
 # announce_period 0
 
 #  TAG: announce_host
+#Default:
+# announce_host tracker.ircache.net
+
 #  TAG: announce_file
+#Default:
+# none
+
 #  TAG: announce_port
 #	announce_host and announce_port set the hostname and port
 #	number where the registration message will be sent.
@@ -3740,7 +3827,6 @@ refresh_pattern .		0	20%	4320
 #	the contents of that file will be included in the announce
 #	message.
 #Default:
-# announce_host tracker.ircache.net
 # announce_port 3131
 
 # HTTPD-ACCELERATOR OPTIONS
@@ -3829,6 +3915,11 @@ refresh_pattern .		0	20%	4320
 #		class 5		Requests are grouped according their tag (see
 #				external_acl's tag= reply).
 #
+#
+#	Each pool also requires a delay_parameters directive to configure the pool size
+#	and speed limits used whenever the pool is applied to a request. Along with
+#	a set of delay_access directives to determine when it is used.
+#
 #	NOTE: If an IP address is a.b.c.d
 #		-> bits 25 through 32 are "d"
 #		-> bits 17 through 24 are "c"
@@ -3868,45 +3959,47 @@ refresh_pattern .		0	20%	4320
 #
 #	This defines the parameters for a delay pool.  Each delay pool has
 #	a number of "buckets" associated with it, as explained in the
-#	description of delay_class.  For a class 1 delay pool, the syntax is:
+#	description of delay_class.
 #
-#delay_parameters pool aggregate
+#	For a class 1 delay pool, the syntax is:
+#		delay_pools pool 1
+#		delay_parameters pool aggregate
 #
 #	For a class 2 delay pool:
-#
-#delay_parameters pool aggregate individual
+#		delay_pools pool 2
+#		delay_parameters pool aggregate individual
 #
 #	For a class 3 delay pool:
-#
-#delay_parameters pool aggregate network individual
+#		delay_pools pool 3
+#		delay_parameters pool aggregate network individual
 #
 #	For a class 4 delay pool:
-#
-#delay_parameters pool aggregate network individual user
+#		delay_pools pool 4
+#		delay_parameters pool aggregate network individual user
 #
 #	For a class 5 delay pool:
+#		delay_pools pool 5
+#		delay_parameters pool tagrate
 #
-#delay_parameters pool tag
-#
-#	The variables here are:
+#	The option variables are:
 #
 #		pool		a pool number - ie, a number between 1 and the
 #				number specified in delay_pools as used in
 #				delay_class lines.
 #
-#		aggregate	the "delay parameters" for the aggregate bucket
+#		aggregate	the speed limit parameters for the aggregate bucket
 #				(class 1, 2, 3).
 #
-#		individual	the "delay parameters" for the individual
+#		individual	the speed limit parameters for the individual
 #				buckets (class 2, 3).
 #
-#		network		the "delay parameters" for the network buckets
+#		network		the speed limit parameters for the network buckets
 #				(class 3).
 #
-#		user		the delay parameters for the user buckets
+#		user		the speed limit parameters for the user buckets
 #				(class 4).
 #
-#		tag		the delay parameters for the tag buckets
+#		tagrate		the speed limit parameters for the tag buckets
 #				(class 5).
 #
 #	A pair of delay parameters is written restore/maximum, where restore is
@@ -3914,30 +4007,39 @@ refresh_pattern .		0	20%	4320
 #	quoted in bits) per second placed into the bucket, and maximum is the
 #	maximum number of bytes which can be in the bucket at any time.
 #
+#	There must be one delay_parameters line for each delay pool.
+#
+#
 #	For example, if delay pool number 1 is a class 2 delay pool as in the
-#	above example, and is being used to strictly limit each host to 64kbps
+#	above example, and is being used to strictly limit each host to 64Kbit/sec
 #	(plus overheads), with no overall limit, the line is:
 #
-#delay_parameters 1 -1/-1 8000/8000
+#		delay_parameters 1 -1/-1 8000/8000
+#
+#	Note that 8 x 8000 KByte/sec -> 64Kbit/sec.
 #
 #	Note that the figure -1 is used to represent "unlimited".
 #
+#
 #	And, if delay pool number 2 is a class 3 delay pool as in the above
-#	example, and you want to limit it to a total of 256kbps (strict limit)
-#	with each 8-bit network permitted 64kbps (strict limit) and each
-#	individual host permitted 4800bps with a bucket maximum size of 64kb
+#	example, and you want to limit it to a total of 256Kbit/sec (strict limit)
+#	with each 8-bit network permitted 64Kbit/sec (strict limit) and each
+#	individual host permitted 4800bit/sec with a bucket maximum size of 64Kbits
 #	to permit a decent web page to be downloaded at a decent speed
 #	(if the network is not being limited due to overuse) but slow down
 #	large downloads more significantly:
 #
-#delay_parameters 2 32000/32000 8000/8000 600/8000
+#		delay_parameters 2 32000/32000 8000/8000 600/8000
+#
+#	Note that 8 x 32000 KByte/sec -> 256Kbit/sec.
+#		  8 x  8000 KByte/sec ->  64Kbit/sec.
+#		  8 x   600 Byte/sec  -> 4800bit/sec.
 #
-#	There must be one delay_parameters line for each delay pool.
 #
 #	Finally, for a class 4 delay pool as in the example - each user will
-#	be limited to 128Kb no matter how many workstations they are logged into.:
+#	be limited to 128Kbits/sec no matter how many workstations they are logged into.:
 #
-#delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
+#		delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
 #Default:
 # none
 
@@ -4102,13 +4204,15 @@ refresh_pattern .		0	20%	4320
 # wccp2_weight 10000
 
 #  TAG: wccp_address
+#Default:
+# wccp_address 0.0.0.0
+
 #  TAG: wccp2_address
 #	Use this option if you require WCCP to use a specific
 #	interface address.
 #
 #	The default behavior is to not bind to any specific address.
 #Default:
-# wccp_address 0.0.0.0
 # wccp2_address 0.0.0.0
 
 # PERSISTENT CONNECTION HANDLING
@@ -4117,13 +4221,15 @@ refresh_pattern .		0	20%	4320
 # Also see "pconn_timeout" in the TIMEOUTS section
 
 #  TAG: client_persistent_connections
+#Default:
+# client_persistent_connections on
+
 #  TAG: server_persistent_connections
 #	Persistent connection support for clients and servers.  By
 #	default, Squid uses persistent connections (when allowed)
 #	with its clients and servers.  You can use these options to
 #	disable persistent connections with clients and/or servers.
 #Default:
-# client_persistent_connections on
 # server_persistent_connections on
 
 #  TAG: persistent_connection_after_error
@@ -4235,6 +4341,9 @@ refresh_pattern .		0	20%	4320
 # snmp_access deny all
 
 #  TAG: snmp_incoming_address
+#Default:
+# snmp_incoming_address any_addr
+
 #  TAG: snmp_outgoing_address
 #	Just like 'udp_incoming_address', but for the SNMP port.
 #
@@ -4254,7 +4363,6 @@ refresh_pattern .		0	20%	4320
 #	NOTE, snmp_incoming_address and snmp_outgoing_address can not have
 #	the same value since they both use port 3401.
 #Default:
-# snmp_incoming_address any_addr
 # snmp_outgoing_address no_addr
 
 # ICP OPTIONS
@@ -4351,13 +4459,15 @@ refresh_pattern .		0	20%	4320
 # minimum_direct_rtt 400
 
 #  TAG: netdb_low
+#Default:
+# netdb_low 900
+
 #  TAG: netdb_high
 #	The low and high water marks for the ICMP measurement
 #	database.  These are counts, not percents.  The defaults are
 #	900 and 1000.  When the high water mark is reached, database
 #	entries will be deleted until the low mark is reached.
 #Default:
-# netdb_low 900
 # netdb_high 1000
 
 #  TAG: netdb_ping_period
@@ -4748,20 +4858,30 @@ refresh_pattern .		0	20%	4320
 # -----------------------------------------------------------------------------
 
 #  TAG: incoming_icp_average
+#Default:
+# incoming_icp_average 6
+
 #  TAG: incoming_http_average
+#Default:
+# incoming_http_average 4
+
 #  TAG: incoming_dns_average
+#Default:
+# incoming_dns_average 4
+
 #  TAG: min_icp_poll_cnt
+#Default:
+# min_icp_poll_cnt 8
+
 #  TAG: min_dns_poll_cnt
+#Default:
+# min_dns_poll_cnt 8
+
 #  TAG: min_http_poll_cnt
 #	Heavy voodoo here.  I can't even believe you are reading this.
 #	Are you crazy?  Don't even think about adjusting these unless
 #	you understand the algorithms in comm_select.c first!
 #Default:
-# incoming_icp_average 6
-# incoming_http_average 4
-# incoming_dns_average 4
-# min_icp_poll_cnt 8
-# min_dns_poll_cnt 8
 # min_http_poll_cnt 8
 
 #  TAG: accept_filter
@@ -4937,7 +5057,11 @@ refresh_pattern .		0	20%	4320
 # Note: This option is only available if Squid is rebuilt with the
 #       --enable-icap-client option
 #
-#	This adds the header "X-Client-IP" to ICAP requests.
+#	If enabled, Squid shares HTTP client IP information with adaptation
+#	services. For ICAP, Squid adds the X-Client-IP header to ICAP requests.
+#	For eCAP, Squid sets the libecap::metaClientIp transaction option.
+#
+#	See also: adaptation_uses_indirect_client
 #Default:
 # icap_send_client_ip off
 
@@ -5445,13 +5569,32 @@ refresh_pattern .		0	20%	4320
 #Default:
 # dns_v4_fallback on
 
+#  TAG: dns_v4_first
+#	With the IPv6 Internet being as fast or faster than IPv4 Internet
+#	for most networks Squid prefers to contact websites over IPv6.
+#
+#	This option reverses the order of preference to make Squid contact
+#	dual-stack websites over IPv4 first. Squid will still perform both
+#	IPv6 and IPv4 DNS lookups before connecting.
+#
+#	WARNING:
+#	  This option will restrict the situations under which IPv6
+#	  connectivity is used (and tested). Hiding network problems
+#	  which would otherwise be detected and warned about.
+#Default:
+# dns_v4_first off
+
 #  TAG: ipcache_size	(number of entries)
+#Default:
+# ipcache_size 1024
+
 #  TAG: ipcache_low	(percent)
+#Default:
+# ipcache_low 90
+
 #  TAG: ipcache_high	(percent)
 #	The size, low-, and high-water marks for the IP cache.
 #Default:
-# ipcache_size 1024
-# ipcache_low 90
 # ipcache_high 95
 
 #  TAG: fqdncache_size	(number of entries)
@@ -5621,10 +5764,16 @@ refresh_pattern .		0	20%	4320
 # maximum_single_addr_tries 1
 
 #  TAG: retry_on_error
-#	If set to on Squid will automatically retry requests when
-#	receiving an error response. This is mainly useful if you
-#	are in a complex cache hierarchy to work around access
-#	control errors.
+#	If set to ON Squid will automatically retry requests when
+#	receiving an error response with status 403 (Forbidden),
+#	500 (Internal Error), 501 or 503 (Service not available).
+#	Status 502 and 504 (Gateway errors) are always retried.
+#	
+#	This is mainly useful if you are in a complex cache hierarchy to
+#	work around access control errors.
+#	
+#	NOTE: This retry will attempt to find another working destination.
+#	Which is different from the server which just failed.
 #Default:
 # retry_on_error off