Make renumbering of proof derivation steps optional

[abchugh]

Sophize is using this function to get proofs in a format that can imported. Thus, renumbering needs to be avoided for this case.

[digama0]

It looks like this is still renumbering though, just with a different numbering scheme? Perhaps the constants should be exposed as RunParms instead.

[abchugh]

I am calling this function in a separate piece of code (outside MMJ2) where I call the function with the value false. RunParms can also help but I want to disable this renumbering completely.

[abchugh]

I realize that I should have given you more context:
I am using this function here:
https://github.com/Sophize/METAMATH_SERVER/blob/master/src/main/java/org/sophize/metamath/resourcewriter/ResourceStore.java#L258

I copy-paste all code from mmj2 to this repo. I would like to remove hacks I made and make mmj2 code identical in the two repos.

[abchugh]

Gentle ping!