some performance improvements to the openstack swift backend
some performance improvements to the openstack swift backend

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