fix remote ip detection for load balancer

RemoteAddr again.

fe/http.go

@@ -135,7 +135,8 @@ type httpRequestContext struct {
 }
 
 func (r *httpRequestContext) RemoteAddr() net.IP {
-	return net.ParseIP(r.req.RemoteAddr)
+	host, _, _ := net.SplitHostPort(r.req.RemoteAddr)
+	return net.ParseIP(host)
 }
 
 // Return an active node, chosen according to the current load