Fix broken mpd-dsd-rt (@lexa2575)

Cannot start mpd-dsd-rt and get the following message:

You have chosen: mpd-dsd-rt

Please wait a moment for mpd-dsd-rt to start.

Trying to start MPD (dsd-rt) failed 10 times. Giving up... ERROR: Player mpd-dsd-rt failed to start.

Last known error:

config_file: unrecognized parameter in config file at line 382: realtime_option