Randomize scheduler/mutator for secondary instances

[wizche]

When starting a slave instance it randomly select a power scheduler and if to use the MOpt mutator (-L 0)

[fekir]

Hello @wizche , thank you for your PR.

I just looked at the man page of afl (never used the scheduler), AFAIK the parameter you added can be passed to the main instance too, correct?

Edit: for clarification

I'm asking because the intent of afl-pfuzz is to be as thin as possible.
I would prefer leaving those options out, unless those are necessary for working correctly.

Even the help of afl-pfuzz is a wrapper around afl-fuzz, and parameter parsing tries to ignore everything that it does not care about.

I currently see no reason why the caller of afl-pfuzz could not provide -p scheduler (as as far I understood its supported by the master too), this way afl-pfuzz remains compatible with the original afl, and does not need to know what scheduler are actually implemented.