detect the ubuntu version based on /etc/os-release

Uwe Merbeth

2016-05-09 f5daecadf5846ff0b2d512e6a1a47f17342fe02b

 interface/web/sites/database_edit.php

@@ -262,7 +262,6 @@
               }
               unset($tmp);
            }

         }
      } else {
         // check if client of database parent domain is client of db user!