localrepo: validate supported requirements in makelocalrepository()...
localrepo: validate supported requirements in makelocalrepository()
This should be a glorified code move. I did take the opportunity to
refactor things. We now have a separate function for gathering
requirements and one for validating them.
I also mode cosmetic changes to the code, such as not using
abbreviations and using a set instead of list to model missing
requirements.
Differential Revision:
https://phab.mercurial-scm.org/D4569
