mpd: add page (#6801)

pages/common/mpd.md

@@ -0,0 +1,20 @@
+# mpd
+
+> Music Player Daemon.
+> More information: <https://www.musicpd.org/>.
+
+- Start MPD:
+
+`mpd`
+
+- Start MPD but don't read from the configuration file:
+
+`mpd --no-config`
+
+- Start MPD and don't detach it from the console:
+
+`mpd --no-daemon`
+
+- Kill the currently running MPD session:
+
+`mpd --kill`