[Feature Request] Change server rules on the fly

[tomasAlabes]

Hi, first of all thanks for your work!

Sometimes in the same tests suite you have different tests that need different set of rules, and today the only way to change the rules is starting a new server with those new rules. An example would be expecting the same request to return successfully on one test, and fail on another (the input can't be changed).

Would it be possible to update those rules on the fly so we can make the tests use only 1 server? also making them faster?