Update MpdServer's docstrings
Update MpdServer's docstrings

dbrgn/mopidy,hkariti/mopidy,dbrgn/mopidy,bencevans/mopidy,bencevans/mopidy,glogiotatidis/mopidy,mopidy/mopidy,bacontext/mopidy,rawdlite/mopidy,diandiankan/mopidy,rawdlite/mopidy,hkariti/mopidy,rawdlite/mopidy,hkariti/mopidy,priestd09/mopidy,jmarsik/mopidy,ali/mopidy,woutervanwijk/mopidy,mokieyue/mopidy,bencevans/mopidy,priestd09/mopidy,vrs01/mopidy,vrs01/mopidy,tkem/mopidy,mopidy/mopidy,tkem/mopidy,SuperStarPL/mopidy,pacificIT/mopidy,jmarsik/mopidy,vrs01/mopidy,diandiankan/mopidy,quartz55/mopidy,jodal/mopidy,adamcik/mopidy,vrs01/mopidy,jcass77/mopidy,abarisain/mopidy,hkariti/mopidy,kingosticks/mopidy,pacificIT/mopidy,quartz55/mopidy,ZenithDK/mopidy,dbrgn/mopidy,swak/mopidy,dbrgn/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,SuperStarPL/mopidy,adamcik/mopidy,quartz55/mopidy,jodal/mopidy,SuperStarPL/mopidy,swak/mopidy,bacontext/mopidy,mokieyue/mopidy,mokieyue/mopidy,ali/mopidy,ali/mopidy,pacificIT/mopidy,mokieyue/mopidy,jcass77/mopidy,pacificIT/mopidy,ZenithDK/mopidy,jcass77/mopidy,diandiankan/mopidy,bencevans/mopidy,mopidy/mopidy,bacontext/mopidy,quartz55/mopidy,jmarsik/mopidy,glogiotatidis/mopidy,swak/mopidy,jmarsik/mopidy,kingosticks/mopidy,diandiankan/mopidy,glogiotatidis/mopidy,tkem/mopidy,liamw9534/mopidy,liamw9534/mopidy,priestd09/mopidy,adamcik/mopidy,bacontext/mopidy,ali/mopidy,abarisain/mopidy,ZenithDK/mopidy,jodal/mopidy,woutervanwijk/mopidy,SuperStarPL/mopidy,rawdlite/mopidy,swak/mopidy,tkem/mopidy,kingosticks/mopidy