Fixes spelling errors in binary

--- a/parseoptions.c
+++ b/parseoptions.c
@@ -174,7 +174,7 @@
                         str[j++] = '/';
                     break;
                 }
-                fprintf(stderr, "invalid IP adress in route\n");
+                fprintf(stderr, "invalid IP address in route\n");
                 fail_parse_route();
             case ':':
                 if ((!i) && j && j < 4)
--- a/getifname.c
+++ b/getifname.c
@@ -206,7 +206,7 @@
                                 printf("DEBUG: Output interface address: %s\n",
                                         inet_ntoa(output_if_addr.sin_addr));
 			/* Put something in saved_ifname in order to tell
-			   that the output adress is known */
+			   that the output address is known */
 			saved_ifname[0] = 'X'; saved_ifname[1] = 0;
                 } else {
                         fprintf(stderr, "Warning: Unable to guess the output "
--- a/usage.c
+++ b/usage.c
@@ -50,7 +50,7 @@
 "  -r  --rel        relativize id field          (to estimate host traffic)\n"
 "  -f  --frag       split packets in more frag.  (may pass weak acl)\n"
 "  -x  --morefrag   set more fragments flag\n"
-"  -y  --dontfrag   set dont fragment flag\n"
+"  -y  --dontfrag   set don't fragment flag\n"
 "  -g  --fragoff    set the fragment offset\n"
 "  -m  --mtu        set virtual mtu, implies --frag if packet size > mtu\n"
 "  -o  --tos        type of service (default 0x00), try --tos help\n"
@@ -126,8 +126,8 @@
 "ICMP help:\n"
 " ICMP concerned packet options:\n"
 "  --icmp-ipver     set ip version               ( default 4 )\n"
-"  --icmp-iphlen    set ip header lenght         ( default IPHDR_SIZE >> 2)\n"
-"  --icmp-iplen     set ip total lengtht         ( default real lenght )\n"
+"  --icmp-iphlen    set ip header length         ( default IPHDR_SIZE >> 2)\n"
+"  --icmp-iplen     set ip total length          ( default real length )\n"
 "  --icmp-ipid      set ip id                    ( default random )\n"
 "  --icmp-ipproto   set ip protocol              ( default IPPROTO_TCP )\n"
 "  --icmp-ipsrc     set ip source                ( default 0.0.0.0 )\n"
--- a/sendtcp.c
+++ b/sendtcp.c
@@ -50,7 +50,7 @@
 	memcpy(&pseudoheader->saddr, &local.sin_addr.s_addr, 4);
 	memcpy(&pseudoheader->daddr, &remote.sin_addr.s_addr, 4);
 	pseudoheader->protocol		= 6; /* tcp */
-	pseudoheader->lenght		= htons(TCPHDR_SIZE+tcp_opt_size+data_size);
+	pseudoheader->length		= htons(TCPHDR_SIZE+tcp_opt_size+data_size);
 
 	/* tcp header */
 	tcp->th_dport	= htons(dst_port);
--- a/sendudp.c
+++ b/sendudp.c
@@ -46,7 +46,7 @@
 	memcpy(&pseudoheader->saddr, &local.sin_addr.s_addr, 4);
 	memcpy(&pseudoheader->daddr, &remote.sin_addr.s_addr, 4);
 	pseudoheader->protocol		= 17; /* udp */
-	pseudoheader->lenght		= htons(packet_size);
+	pseudoheader->length		= htons(packet_size);
 
 	/* udp header */
 	udp->uh_dport	= htons(dst_port);
--- a/sendicmp.c
+++ b/sendicmp.c
@@ -243,7 +243,7 @@
 	memcpy(&pseudoheader->saddr, &icmp_ip_src.sin_addr.s_addr, 4);
 	memcpy(&pseudoheader->daddr, &icmp_ip_dst.sin_addr.s_addr, 4);
 	pseudoheader->protocol = icmp_ip.protocol;
-	pseudoheader->lenght = icmp_ip.tot_len;
+	pseudoheader->length = icmp_ip.tot_len;
 	icmp_udp->uh_sport = htons(icmp_ip_srcport);
 	icmp_udp->uh_dport = htons(icmp_ip_dstport);
 	icmp_udp->uh_ulen  = htons(UDPHDR_SIZE + udp_data_len);
--- a/hping2.h
+++ b/hping2.h
@@ -134,7 +134,7 @@
 	
 /* fragmentation defines */
 #define MF ((unsigned short)0x2000)	/* more fragments */
-#define DF ((unsigned short)0x4000)	/* dont fragment */
+#define DF ((unsigned short)0x4000)	/* don't fragment */
 #define NF ((unsigned short)0x0000)	/* no more fragments */
 
 /* ip options defines */
@@ -337,7 +337,7 @@
 	__u32 daddr;
 	__u8  zero;
 	__u8  protocol;
-	__u16 lenght;
+	__u16 length;
 };
 
 #define PSEUDOHDR_SIZE sizeof(struct pseudohdr)
--- a/ars.c
+++ b/ars.c
@@ -698,7 +698,7 @@
 	memcpy(&pseudo.daddr, &ip->daddr, 4);
 	pseudo.protocol = (pkt->p_layer[layer].l_type == ARS_TYPE_TCP)
 		? ARS_IPPROTO_TCP : ARS_IPPROTO_UDP;
-	pseudo.lenght = htons(ars_relative_size(pkt, layer));
+	pseudo.length = htons(ars_relative_size(pkt, layer));
 
 	/* Finally do the checksum */
 	ars_multi_cksum(&mc, ARS_MC_INIT, NULL, 0);
--- a/datahandler.c
+++ b/datahandler.c
@@ -26,7 +26,7 @@
 	}
 
 	if (opt_sign) {
-		memcpy(data, sign, signlen); /* lenght pre-checked */
+		memcpy(data, sign, signlen); /* length pre-checked */
 		data+=signlen;
 		data_size-=signlen;
 	}
--- a/ars.h
+++ b/ars.h
@@ -67,7 +67,7 @@
 #define ARS_MAX_IP_SIZE		65535
 
 #define ARS_IP_MF ((unsigned short)0x2000)	/* more fragments */
-#define ARS_IP_DF ((unsigned short)0x4000)	/* dont fragment */
+#define ARS_IP_DF ((unsigned short)0x4000)	/* don't fragment */
 #define ARS_IP_RF ((unsigned short)0x8000)	/* reserved fragment flag */
 
 #define ARS_IPOPT_COPY		0x80
@@ -308,7 +308,7 @@
 	__u32 daddr;
 	__u8  zero;
 	__u8  protocol;
-	__u16 lenght;
+	__u16 length;
 };
 
 /* The IGRP header structure */
--- a/sendip_handler.c
+++ b/sendip_handler.c
@@ -35,7 +35,7 @@
 		unsigned short fragment_flag = 0;
 
 		if (opt_mf) fragment_flag |= MF; /* more fragments */
-		if (opt_df) fragment_flag |= DF; /* dont fragment */
+		if (opt_df) fragment_flag |= DF; /* don't fragment */
 		send_ip((char*)&local.sin_addr,
 			(char*)&remote.sin_addr,
 			packet, size, fragment_flag, ip_frag_offset,