Forwards wechat group messages to slack
For use with mitmdump. Run mitmdump -s capture.py. And then set your broswer's
HTTP proxy to 127.0.0.1:8080. You can change the port with the -p option of
mitmdump.
Listens on given port. When receiving a text message from a group in the groups
list in config.py, it sends that message to the slack channel specified in
config.py. If you change the server_address in config.py, you should
also edit capture.py accordingly.