Log Message:
Update to 1.2.3. Set LICENSE.
Two of the patches were from upstream CVS, the other two are not needed
any longer because the configure script was improved.

libvorbis 1.2.3 (2009-07-09) -- "Xiph.Org libVorbis I 20090709"

 * correct a vorbisfile bug that prevented proper playback of
   Vorbis files where all audio in a logical stream is in a
   single page
 * Additional decode setup hardening against malicious streams
 * Add 'OV_EXCLUDE_STATIC_CALLBACKS' define for developers who
   wish to avoid avoid unused symbol warnings from the static
   callbacks defined in vorbisfile.h

libvorbis 1.2.2 (2009-06-24) -- "Xiph.Org libVorbis I 20090624"

 * define VENDOR and ENCODER strings
 * seek correctly in files bigger than 2 GB (Windows)
 * fix regression from CVE-2008-1420; 1.0b1 files work again
 * mark all tables as constant to reduce memory occupation
 * additional decoder hardening against malicious streams
 * substantially reduce amount of seeking performed by Vorbisfile
 * Multichannel decode bugfix
 * build system updates
 * minor specification clarifications/fixes

libvorbis 1.2.1 (unreleased) -- "Xiph.Org libVorbis I 20080501"

 * Improved robustness with corrupt streams.
 * New ov_read_filter() vorbisfile call allows filtering decoded
   audio as floats before converting to integer samples.
 * Fix an encoder bug with multichannel streams.
 * Replaced RTP payload format draft with RFC 5215.
 * Bare bones self test under 'make check'.
 * Fix a problem encoding some streams between 14 and 28 kHz.
 * Fix a numerical instability in the edge extrapolation filter.
 * Build system improvements.
 * Specification correction.