Add openvpn and openconnect

test/testdata/openconnect/ocserv/echo_server.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+import socket
+import threading
+
+
+def echo(connection):
+    with connection:
+        while True:
+            data = connection.recv(65536)
+            if not data:
+                return
+            connection.sendall(data)
+
+
+listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+listener.bind(("0.0.0.0", 18080))
+listener.listen()
+print("openconnect echo ready", flush=True)
+while True:
+    accepted, _ = listener.accept()
+    threading.Thread(target=echo, args=(accepted,), daemon=True).start()