From Fedora Project Wiki

This is a list of files with special meaning in CVS. They should be treated with care.

filename where who meaning contents
dead.package branch directory maintainer The package is "dead", and has been removed from extras Should contain the reason the package is dead
needs.rebuild branch directory varies, typically automation Branch needs rebuild for some reason typically empty. see, e.g., ["Extras/Schedule/FC6MassRebuild"]

Proposed

filename where who meaning contents
unmaintained.release branch directory usually automation on release going to legacy the branch is unmaintained reason the branch is released, e.g. "core went to legacy"
maintained.by branch directory the branch maintainer This branch of the package is maintained, but not by the package maintainer listed in owners.list one per line, a person (a lia "Name <email@foo.com>") or SIG mailing list (a la "Fedora Perl <fedora-perl-devel-list@redhat.com>