Merge pull request #958 from amazeeio/fastcgi-remote-addr-clean

remove `::ffff:` also from fastcgi param `REMOTE_ADDR`

images/nginx/fastcgi.conf

@@ -5,6 +5,14 @@ if ($http_x_forwarded_proto = 'https') {
     set $fastcgi_port  "443";
 }
 
+set_by_lua_block $remote_addr_clean {
+  if string.find(ngx.var.remote_addr, "^::ffff:") then
+    return string.match(ngx.var.remote_addr, "^::ffff:(.*)"))
+  else
+    return ngx.var.remote_addr
+  end
+}
+
 fastcgi_param  SCRIPT_FILENAME    $realpath_root$fastcgi_script_name;
 fastcgi_param  QUERY_STRING       $query_string;
 fastcgi_param  REQUEST_METHOD     $request_method;
@@ -23,7 +31,7 @@ fastcgi_param  HTTPS              $fastcgi_https if_not_empty;
 fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
 fastcgi_param  SERVER_SOFTWARE    nginx/$nginx_version;
 
-fastcgi_param  REMOTE_ADDR        $remote_addr;
+fastcgi_param  REMOTE_ADDR        $remote_addr_clean;
 fastcgi_param  REMOTE_PORT        $remote_port;
 fastcgi_param  SERVER_ADDR        $server_addr;