Merge pull request #1134 from ptbrown/auth-error-reporting

inc/auth.php

inc/lang/en/lang.php

lib/plugins/auth.php

lib/plugins/authad/auth.php

lib/plugins/authad/lang/en/lang.php

lib/plugins/authldap/auth.php

lib/plugins/authldap/lang/en/lang.php

lib/plugins/authmysql/auth.php

lib/plugins/authmysql/lang/en/lang.php

lib/plugins/authplain/auth.php

lib/plugins/authplain/lang/af/lang.php

lib/plugins/authplain/lang/ar/lang.php

lib/plugins/authplain/lang/az/lang.php

lib/plugins/authplain/lang/bg/lang.php

lib/plugins/authplain/lang/bn/lang.php

lib/plugins/authplain/lang/ca-valencia/lang.php

lib/plugins/authplain/lang/ca/lang.php

lib/plugins/authplain/lang/cs/lang.php

lib/plugins/authplain/lang/da/lang.php

lib/plugins/authplain/lang/de-informal/lang.php