add pthread in the project

[samchen123]

hi everyone:
In the beginning, the project so far runs very well, I thank for everyone who contribute to the project.

I use the websocket secure to server the wss client.
I find that when many clients connect the server at the same time, the Server is too busy to response quickly
I am thinking adding the pthread to solve the problem
whenever a client comes, the server create another thread to handle it.
is anyone have time to share how to add the pthread in this project

very thanks.