Strip invalid characters from playlist names for MPD frontend
Strip invalid characters from playlist names for MPD frontend

Fixes mopidy/mopidy$480 and mopidy/mopidy#474

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