Title: #250: cache_req: Use ternary operator instead of bool+switch
No, it was decided that just other people like the if more, not that it is more
Remember that forcing your opinion on a NACK will be taken into consideration when
you'll be NACKing something ... (which is fine by me, but may not be for you).
See the full comment at https://github.com/SSSD/sssd/pull/250#issuecomment-297916561