Merge branch 'stable-3.1'

Marius Burkard

2016-04-20 4569cae57f127afd093794310ccd290d2d9fdf36

 server/plugins-available/mail_plugin.inc.php

@@ -247,7 +247,7 @@
         $mailHeaders     .= "Content-Type: text/html; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Transfer-Encoding: quoted-printable" . "\n";
      } else {
         $mailHeaders     .= "Content-type: text/plain; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Type: text/plain; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Transfer-Encoding: 8bit" . "\n";
      }
      $mailHeaders     .= "From: $welcome_mail_from" . "\n";