Added GADDUSERCommand.
Cleaned up how we retrieve group names, now using acl::GroupCache::GIDToName.
support for special vars [:username:] and [:groupname:] in path rights
replaced emplace with insert, fixed not saving primary gid properly
multiple config search paths, added makefile target for building dist packages
Merge branch 'bio-master' of github.com:jawr/ebftpd into bio-master