Update to upstream release 0.22.4.
Details:
- Mostly bug fixes, see https://raw.githubusercontent.com/MusicPlayerDaemon/MPD/v0.22.4/NEWS
- While on it, remove no longer necessary USES=gnome, reported in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252852 by Oleh Vinichenko <moonlapse81@gmail.com>
MFH: 2021Q1