UDP protocol support

[Jayx239]

This project is super good for http protocol based testing, but I have ran into a use case where I am trying to test a custom udp protocol latency under load which is not supported. The basic functionality of the protocol is that you send a request with a nonce, and the remote server sends an ack response back.

This is something that I personally want to work on, but want to see if something like this fits into your vision for the project that I could implement.