#999 Fix ogClient session command

Disconnect gracefully from ogServer after booting OS, the script to start the
OS calls kexec, so everything is gone after it. For Windows, this results in a
reboot.

This commit also improves the disconnect function to make sure the
disconnection is synchronous.

src/ogClient.py

@@ -119,6 +119,7 @@ class ogClient:
 
 	def disconnect(self):
 		self.state = State.FORCE_DISCONNECTED
+		self.sock.shutdown(socket.SHUT_RDWR)
 		self.sock.close()
 
 	def run(self):

src/ogRest.py

@@ -120,7 +120,7 @@ class ogThread():
 
 		response = restResponse(ogResponses.OK)
 		client.send(response.get())
-		ogRest.state = ThreadState.IDLE
+		client.disconnect()
 
 	def software(client, request, path, ogRest):
 		try: