Re: Libify the index refresh logic

Linus Torvalds [off-list ref] writes:

This cleans up and libifies the "git update-index --[really-]refresh" 
functionality. This will be eventually required for eventually doing the 
"commit" and "status" commands as built-ins.

Thanks.

With the recent torrent of moving functions around across files
without necessarily making the old file empty (thus resulting in
what some people call "file rename"), the Porcelainish people
would have enough testcases to think about how to handle merges
that involve with cases like these.