Log: fix logging the right IP address when install behind a reverse proxy

src/Log.php

@@ -133,6 +133,20 @@ class Log {
     set_exception_handler(array('EesyPHP\\Log', 'exception'));
   }
 
+  /**
+   * Get remote IP address
+   * @return string
+   */
+  public static function get_remote_addr(){
+    if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER))
+      return  $_SERVER["HTTP_X_FORWARDED_FOR"];
+    if (array_key_exists('REMOTE_ADDR', $_SERVER))
+      return $_SERVER["REMOTE_ADDR"];
+    if (array_key_exists('HTTP_CLIENT_IP', $_SERVER))
+      return $_SERVER["HTTP_CLIENT_IP"];
+    return '';
+  }
+
   /**
    * Log a message
    * @param string $level The message level (key of self :: $levels)
@@ -171,7 +185,7 @@ class Log {
       $msg = array(
         date('Y/m/d H:i:s'),
         $_SERVER['REQUEST_URI'],
-        $_SERVER['REMOTE_ADDR'],
+        self :: get_remote_addr(),
       );
       if (Auth::enabled())
         $msg[] = (Auth::user()?Auth::user():'anonymous');