Report more meaningful errors when an auth backend fails. closes #1093

lib/plugins/authplain/lang/lb/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Et get schonn e Benotzer mat deem Numm.';

lib/plugins/authplain/lang/lt/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Vartotojas su pasirinktu prisijungimo vardu jau egzistuoja.';

lib/plugins/authplain/lang/lv/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Atvaino, tāds lietotājs jau ir.';

lib/plugins/authplain/lang/mg/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Indrisy fa efa nisy namandrika io anarana io.';

lib/plugins/authplain/lang/mk/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Жалам, корисник со ова корисничко име веќе постои.';

lib/plugins/authplain/lang/mr/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'या नावाने सदस्याची नोंदणी झालेली आहे, कृपया दुसरे सदस्य नाव निवडा.';

lib/plugins/authplain/lang/ms/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Maaf, nama pengguna yang dimasukkan telah diguna. Sila pilih nama yang lain.';

lib/plugins/authplain/lang/ne/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'यो नामको प्रयोगकर्ता पहिले देखि रहेको छ।';

lib/plugins/authplain/lang/nl/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Er bestaat al een gebruiker met deze loginnaam.';

lib/plugins/authplain/lang/no/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Det finnes allerede en konto med dette brukernavnet.';

lib/plugins/authplain/lang/pl/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Użytkownik o tej nazwie już istnieje.';

lib/plugins/authplain/lang/pt-br/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Desculpe, mas já existe um usuário com esse nome.';

lib/plugins/authplain/lang/pt/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Este utilizador já está inscrito. Por favor escolha outro nome de utilizador.';

lib/plugins/authplain/lang/ro/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Ne pare rău, un utilizator cu acest nume este deja autentificat.';

lib/plugins/authplain/lang/ru/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Извините, пользователь с таким логином уже существует.';

lib/plugins/authplain/lang/sk/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Užívateľ s rovnakým menom je už zaregistrovaný.';

lib/plugins/authplain/lang/sl/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Uporabnik s tem imenom že obstaja.';

lib/plugins/authplain/lang/sq/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Na vjen keq, ekziston një përdorues tjetër me të njëjtin emër.';

lib/plugins/authplain/lang/sr/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Извините, корисник са истим именом већ постоји.';

lib/plugins/authplain/lang/sv/lang.php

+<?php
+/**
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ *
+ */
+$lang['userexists']     = 'Det finns redan en användare med det användarnamnet.';