Better fix to change_password.php - primary admin can change their OWN password,

the form displays the error for other admins trying to change the primary
password (before it failed silently) and external auth admin change password
works too!

lang/fr/moodle.php

@@ -69,6 +69,7 @@ $string['administrator'] = 'Administrateur';
 $string['administrators'] = 'Administrateurs';
 $string['administratorsall'] = 'Tous les administrateurs';
 $string['administratorsandteachers'] = 'Administrateurs et enseignants';
+$string['adminprimarynoedit'] = 'Il n\'est pas possible de modifier le mot de passe de l\'administrateur principal';
 $string['advanced'] = 'Avancé';
 $string['advancedfilter'] = 'Plus de critères';
 $string['advancedsettings'] = 'Réglages avancés';