request: Add RemoteAddr helper function

request.go

@@ -119,3 +119,11 @@ func (r *Request) ServerName() string {
 	}
 	return ""
 }
+
+// RemoteAddr returns the remote network address of the client.
+func (r *Request) RemoteAddr() net.Addr {
+	if r.conn != nil {
+		return r.conn.RemoteAddr()
+	}
+	return nil
+}