[Web] Use INTL_IDNA_VARIANT_UTS46 in idn_to_ascii (thanks to @Knight1 !)

[Web] Some PHP fixes (warnings, notices)
[Web] Add quota notification tools

data/web/inc/functions.fail2ban.inc.php

@@ -118,6 +118,7 @@ function fail2ban($_action, $_data = null) {
               if (valid_network($network)) {
                 $redis->hSet('F2B_BLACKLIST', $network, 1);
                 $redis->hDel('F2B_WHITELIST', $network, 1);
+                $response = docker('post', 'netfilter-mailcow', 'restart');
               }
             }
           }