Ask for help to come up with new ways to fuzz Python

[devdanzin]

Currently fusil generates random function and method calls, also calling them from threads, as a way to fuzz Python.

Some ideas to improve on that include adding async execution, object mangling and exercising the JIT.

This issue aims to gather more ways of adding options to fuzzing Python, so that more issues can be found. What do you think would be a good fuzzing vector to be added?