zope4py3: send() must be bytes(), not str().

  File "product/TimerService/timerserver/TimerServer.py", line 71, in run
    s.send('GET / HTTP/1.1\r\n\r\n')
TypeError: a bytes-like object is required, not 'str'

product/TimerService/timerserver/TimerServer.py

@@ -83,7 +83,7 @@ class TimerServer(threading.Thread):
             except socket.error:
                 time.sleep(5)
                 continue
-            s.send('GET / HTTP/1.1\r\n\r\n')
+            s.send(b'GET / HTTP/1.1\r\n\r\n')
             s.recv(4096) # blocks until a response is received
             break
         s.close()