Also reject names with \ in the name
Also reject names with \ in the name

fixes issues #435 and #437

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