config: Make keyring log messages explain more
config: Make keyring log messages explain more

...as a lot of users see debug-level errors from the keyring code and think
they explain some larger issue. These are currently *always* red herrings as
there is no command for setting configuration values in the keyring yet.

Fixes #681

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