Merge branch '4.3' into 4.4

* 4.3:
  Remvove space before self-closing xml tag

Author: OskarStark

security/impersonating_user.rst

@@ -227,7 +227,7 @@ be called:
 
                 <firewall name="main">
                     <!-- ... -->
-                    <switch-user role="CAN_SWITCH_USER" />
+                    <switch-user role="CAN_SWITCH_USER"/>
                 </firewall>
             </config>
         </srv:container>