Re: [PATCH] builtin-commit: fix partial-commit support

The above four are to be applied on top of kh/commit series,
(without the WIP I sent out last night) on top of Dscho's
"Replace "runstatus" with "status" in the tests" patch.

With these, all tests in t/ finally passes for me ;-)

But I am not a heavy user of partial commits nor commits from
subdirectories, so there may still be breakages.