Merge pull request #2 from sailor/patch-1

Fix x-forwarded-for header calculation

Author: cssivision

reverse.go

@@ -215,7 +215,7 @@ func addXForwardedForHeader(req *http.Request) {
 		// X-Forwarded-For information as a comma+space
 		// separated list and fold multiple headers into one.
 		if prior, ok := req.Header["X-Forwarded-For"]; ok {
-			clientIP = strings.Join(prior, ", ") + clientIP
+			clientIP = strings.Join(prior, ", ") + ", " + clientIP
 		}
 		req.Header.Set("X-Forwarded-For", clientIP)
 	}