The source from this directory was copied from the vorbis
subversion repository using the update.sh script. The only changes
made were those applied by update.sh and the addition/update of
Makefile.in and moz.build files for the Mozilla build system.

The upstream version used was vorbis v1.3.7 (84c02369)
from https://gitlab.xiph.org/xiph/vorbis

Some files are renamed during the copy to prevent clashes with object
file names with other Mozilla libraries.