X-Real-IP support and Varnish PURGE config options

X-Real-IP for core functionality

Global config define REVERSE_PROXY_X_HEADERS

Config host and port for varnish PURGE

config option to specify PURGE protocol

exception in curl purge now shows error code

ipv6 x-real-ip addresses are now validated properly

X-Forwarded-Proto enabled by define

ext/log_net/main.php

@@ -15,7 +15,7 @@ class LogNet extends Extension
             if ($this->count < 10) {
                 // TODO: colour based on event->priority
                 $username = ($user && $user->name) ? $user->name : "Anonymous";
-                $str = sprintf("%-15s %-10s: %s", $_SERVER['REMOTE_ADDR'], $username, $event->message);
+                $str = sprintf("%-15s %-10s: %s", get_real_ip(), $username, $event->message);
                 $this->msg($str);
             } elseif ($this->count == 10) {
                 $this->msg('suppressing flood, check the web log');