continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
- Added support for MusicBrainz queries to abcde package
- Added new dependencies to abcde: mkcue, eject, perl, MusicBrainz, MusicBrainzDiscID
- libdiscid version in pkg-config was incorrect; patched libdiscid to fix
- Added WebServices::MusicBrainz Perl module
- Added MusicBrainz::DiscID Perl module
- Commented out XSLoader Perl module since it was broken, no packages depend on it,
and it has been incorporated into the Perl core