Add link to https://mariadb.com/kb/en/library/stored-routine-privileges/

extension/Classes/Core/Database/DatabaseUpdate.php

@@ -203,7 +203,7 @@ class DatabaseUpdate {
         } else {
             $errorMsg[ERROR_MESSAGE_TO_USER] = 'Error while updating qfq.';
             $errorMsg[ERROR_MESSAGE_TO_DEVELOPER] =
-                "Failed to play " . QFQ_FUNCTION_SQL . ", probably not enough permissions for the qfq mysql user. " .
+                "Failed to play " . QFQ_FUNCTION_SQL . ", probably not enough <a href='https://mariadb.com/kb/en/library/stored-routine-privileges/'>permissions</a> for the qfq mysql user. " .
                 "Possible solutions: <ul>" .
                 '<li>Grant SUPER, CREATE ROUTINE, ALTER ROUTINE privileges to qfq mysql user temporarily.</li>' .
                 '<li>Play the following file manually on the database: ' .