Fixed instanceof to use interface instead of class
Fixed instanceof to use interface instead of class

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