more resilient logging
more resilient logging

* don't fail if the first argument to a log call is null or undefined
* the return value of addField is never used, so remove return statement

reversefold/eleven-server,yelworc/eleven-server,Whizy/eleven-server,Mexiswow/eleven-server,ElevenGiants/eleven-server,Whizy/eleven-server,KaiyonAlatar/eleven-server,Mexiswow/eleven-server,yelworc/eleven-server,KaiyonAlatar/eleven-server,ElevenGiants/eleven-server,ElevenGiants/eleven-server,reversefold/eleven-server,KaiyonAlatar/eleven-server,Whizy/eleven-server