added RPCClient with interface symmetrical to RPCServer

rpcclient.py

@@ -0,0 +1,11 @@
+import xmlrpc.client as xrc
+
+
+class RPCClient(xrc.ServerProxy):
+
+    def __init__(self, host, port, *args, **kwargs):
+        uri = f"http://{host}:{port}/"
+        super().__init__(uri, *args, **kwargs)
+
+
+