Set locale for utf-8 support, remove mb_escapeshellarg (deprecated)

includes/functions.php

@@ -518,19 +518,6 @@ function cache($key, $callback)
     }
 }
 
-// insspired by
-// http://markushedlund.com/dev/php-escapeshellarg-with-unicodeutf-8-support
-function mb_escapeshellarg($arg)
-{
-    $isWindows = strtolower(substr(PHP_OS, 0, 3)) === 'win';
-    if ($isWindows) {
-        $escaped_arg = str_replace(array('"', '%'), '', $arg);
-    } else {
-        $escaped_arg = str_replace("'", "'\\''", $arg);
-    }
-    return "\"$escaped_arg\"";
-}
-
 function dnsServers()
 {
     $data = json_decode(file_get_contents("./config/dns-servers.json"));