injecting network faults under synctest

[Jason E. Aten]

Go 1.25rc1 includes the new exciting and no-longer-experimental 

testing/synctest package. 

To make use of synctest in your tests of network code, you'll need to mock,

or simulate the network. 

To help with this, I wrote gosimnet. https://github.com/glycerine/gosimnet

Gosimnet not only mocks (simulates) the network in a way that

enables synctest bubbles to block, but also allows you to isolate servers,

and to inject asymmetric and probabilistic network card faults into the mock.

A whole set of faults and be applied, and reversed,  with a single call.

I've fleshed out the API for fault modeling recently. You can see the API description here. 

https://github.com/glycerine/gosimnet?tab=readme-ov-file#network-modeling-api-summary

It is not set in stone yet, to allow for your feedback.

Enjoy.

Jason