catch "no such file or directory" error when connecting with no net
catch "no such file or directory" error when connecting with no net

soren reports it happening on his computer; can't repro it here

also make sure exception is always converted to string in reliable way

holycrepe/anki,subfusc/anki,hssm/anki,go38/anki,Arthaey/anki,abeyer/anki,socialpercon/anki-1,ospalh/libanki3,Stvad/anki,kenjhim/anki,jkitching/anki,eduOS/anki,jakesyl/ruby-card,weihautin/anki,weihautin/anki,hssm/anki,xuewenfei/anki,jakesyl/ruby-card,florianjacob/anki,sunclx/anki,LucasCabello/anki