Merge branch 'master' into core-updates
gnu: Add ncmpc. * gnu/packages/mpd.scm (ncmpc): New variable.
Merge branch 'master' into core-updates Conflicts: gnu/packages/libwebsockets.scm
gnu: Add mpd. * gnu/packages/mpd.scm (mpd): New variable.
gnu: Add libmpdclient. * gnu/packages/mpd.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it.