add dberrornice template for database-errors

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

install/lib/class.FroxlorInstall.php

@@ -441,7 +441,7 @@ class FroxlorInstall
 			return bin2hex(openssl_random_pseudo_bytes($length));
 		}
 		// if everything else fails, use unsafe fallback
-		return md5(uniqid(microtime(), 1));
+		return substr(md5(uniqid(microtime(), 1)), 0, $length);
 	}
 
 	/**