Fall back to default log file if logfile config file not found, suppress writing errors, fixes issue #826
Fall back to default log file if logfile config file not found, suppress writing errors, fixes issue #826

xx621998xx/server,lrytz/core,lrytz/core,xx621998xx/server,Ardinis/server,sharidas/core,cernbox/core,andreas-p/nextcloud-server,owncloud/core,endsguy/server,sharidas/core,Ardinis/server,pmattern/server,pollopolea/core,pollopolea/core,owncloud/core,IljaN/core,xx621998xx/server,owncloud/core,lrytz/core,bluelml/core,owncloud/core,pixelipo/server,whitekiba/server,sharidas/core,endsguy/server,IljaN/core,endsguy/server,IljaN/core,Ardinis/server,pmattern/server,phil-davis/core,pollopolea/core,xx621998xx/server,pixelipo/server,nextcloud/server,nextcloud/server,pixelipo/server,whitekiba/server,pollopolea/core,sharidas/core,michaelletzgus/nextcloud-server,endsguy/server,nextcloud/server,cernbox/core,bluelml/core,sharidas/core,pmattern/server,Ardinis/server,pixelipo/server,endsguy/server,jbicha/server,jbicha/server,jbicha/server,xx621998xx/server,IljaN/core,lrytz/core,jbicha/server,andreas-p/nextcloud-server,whitekiba/server,bluelml/core,pmattern/server,michaelletzgus/nextcloud-server,jbicha/server,cernbox/core,bluelml/core,pmattern/server,owncloud/core,pixelipo/server,andreas-p/nextcloud-server,IljaN/core,Ardinis/server,michaelletzgus/nextcloud-server,cernbox/core,whitekiba/server,nextcloud/server,michaelletzgus/nextcloud-server,whitekiba/server,pollopolea/core,bluelml/core,andreas-p/nextcloud-server,lrytz/core,andreas-p/nextcloud-server,cernbox/core