Merge branch 'mr/bisect-in-c-4'

Piecemeal of rewrite of "git bisect" in C continues.

* mr/bisect-in-c-4:
  bisect--helper: retire `--check-and-set-terms` subcommand
  bisect--helper: reimplement `bisect_skip` shell function in C
  bisect--helper: retire `--bisect-auto-next` subcommand
  bisect--helper: use `res` instead of return in BISECT_RESET case option
  bisect--helper: retire `--bisect-write` subcommand
  bisect--helper: reimplement `bisect_replay` shell function in C
  bisect--helper: reimplement `bisect_log` shell function in C