periodically break out of idle mode to see if the connection to MPD is intact

periodically break out of idle mode to see if the connection to MPD is intact

it may be hanging if for example the local system was suspended. in
this situation mpd would detect the missing peer (us) when e.g. reporting
idle changes and close the tcp socket. later, the local system resumes
and the local tcp connection is still open and waiting for an idle result
forever