Update user.php
Update user.php

Fixes $_setupedBackends[] into self::$_setupedBackends[] so that setuped backends are REALLY remembered and not instanciated many times.
jbicha/server,owncloud/core,owncloud/core,Ardinis/server,michaelletzgus/nextcloud-server,IljaN/core,xx621998xx/server,nextcloud/server,Ardinis/server,xx621998xx/server,endsguy/server,sharidas/core,xx621998xx/server,whitekiba/server,sharidas/core,andreas-p/nextcloud-server,pmattern/server,nextcloud/server,pollopolea/core,Ardinis/server,IljaN/core,whitekiba/server,cernbox/core,pollopolea/core,endsguy/server,nextcloud/server,bluelml/core,bluelml/core,endsguy/server,owncloud/core,pixelipo/server,sharidas/core,pmattern/server,whitekiba/server,pixelipo/server,nextcloud/server,lrytz/core,pollopolea/core,Ardinis/server,pmattern/server,endsguy/server,phil-davis/core,IljaN/core,jbicha/server,lrytz/core,pmattern/server,jbicha/server,lrytz/core,andreas-p/nextcloud-server,IljaN/core,whitekiba/server,bluelml/core,michaelletzgus/nextcloud-server,sharidas/core,lrytz/core,cernbox/core,cernbox/core,xx621998xx/server,endsguy/server,michaelletzgus/nextcloud-server,xx621998xx/server,pollopolea/core,andreas-p/nextcloud-server,sharidas/core,lrytz/core,andreas-p/nextcloud-server,cernbox/core,jbicha/server,pmattern/server,pixelipo/server,andreas-p/nextcloud-server,bluelml/core,jbicha/server,whitekiba/server,michaelletzgus/nextcloud-server,Ardinis/server,bluelml/core,IljaN/core,pixelipo/server,owncloud/core,owncloud/core,pixelipo/server,cernbox/core,pollopolea/core