Convert devel/snappy to multiarch.
Convert databases/poco-data-sqlite to multiarch.
Convert audio/id3lib to multiarch.
Convert misc/libcdio to multiarch.
Convert multimedia/libmatroska to multiarch.
Convert graphics/giflib to multiarch.
Multiarch fix for lang/perl5
Multiarch fix for www/apache2{2,4}.

The suexec link was being modified instead of the real binary, causing
isaexec to become broken.