Re: [PATCH] use lockfile.c routines in git_commit_set_multivar()

"Bradford Smith" [off-list ref] writes:

FWIW, I have successfully run 'make test' and also verified that it
behaves as I expect with my ~/.gitconfig symlink (in conjunction with
the my other patch for resolving symlinks).

Existing "make test" testsuite is not an appropriate thing to
say this patch is safe, as we do not have much symlinking in the
test git repository there.  Care to add a new test or two?