Remove transitional code left over from MOC 2.5.

git-svn-id: svn://daper.net/moc/trunk@2671 910807d9-36e0-0310-a014-e9ea483e2ba4
Remove the deprecated autogen.sh from the MOC 2.6 release series.

'autogen.sh' is now redundant; use 'autoreconf(1)' instead.

git-svn-id: svn://daper.net/moc/trunk@2672 910807d9-36e0-0310-a014-e9ea483e2ba4
Remove support for the deprecated ffmpeg-config.

git-svn-id: svn://daper.net/moc/trunk@2673 910807d9-36e0-0310-a014-e9ea483e2ba4
Raise minimum FFmpeg/LibAV requirement to release 0.7.

According to FFmpeg's MAINTAINERS file releases prior to this are no
longer supported.

git-svn-id: svn://daper.net/moc/trunk@2674 910807d9-36e0-0310-a014-e9ea483e2ba4
Raise the minimum FLAC requirement to release 1.1.3.

This is the version in which FLAC__SeekableStreamDecoder was merged
into FLAC__StreamDecoder.

git-svn-id: svn://daper.net/moc/trunk@2675 910807d9-36e0-0310-a014-e9ea483e2ba4
Raise the minimum Berkeley DB requirement to release 4.1.

The BDB API changed between 4.0 and 4.1, so use just the new one.

git-svn-id: svn://daper.net/moc/trunk@2676 910807d9-36e0-0310-a014-e9ea483e2ba4
Raise the minimum libcurl requirement to version 7.15.1.

This is the version in which 'libcurl.pc' is first installed, which
will be made use of shortly.

git-svn-id: svn://daper.net/moc/trunk@2677 910807d9-36e0-0310-a014-e9ea483e2ba4
Raise the minimum Autoconf requirement to version 2.64.

git-svn-id: svn://daper.net/moc/trunk@2678 910807d9-36e0-0310-a014-e9ea483e2ba4
Make XZ the default compression for 'make dist'.

XZ offers much better compression (in most cases) and most
distributions use it by default now.

git-svn-id: svn://daper.net/moc/trunk@2679 910807d9-36e0-0310-a014-e9ea483e2ba4
Remove warning about the MOC program being named 'mocp'.

git-svn-id: svn://daper.net/moc/trunk@2680 910807d9-36e0-0310-a014-e9ea483e2ba4
Reword requirement warnings to indicate they are imminent.

git-svn-id: svn://daper.net/moc/trunk@2681 910807d9-36e0-0310-a014-e9ea483e2ba4
Bump version numbers to 2.6-alpha1.

Note that the micro version number has been dropped for development
releases and this represents a change of release numbering convention.

git-svn-id: svn://daper.net/moc/trunk@2682 910807d9-36e0-0310-a014-e9ea483e2ba4