[PATCH] Add git-relink-script to fix up missing hardlinks

[PATCH] Add git-relink-script to fix up missing hardlinks

This will scan 2 or more object repositories and look for common objects, check
if they are hardlinked, and replace one with a hardlink to the other if not.

This version warns when skipping files because of size differences, and
handle more than 2 repositories automatically.

Signed-off-by: Ryan Anderson <redacted>
Cheered-on-by: Jeff Garzik <redacted>
Acked-by: Junio C Hamano <redacted>
Signed-off-by: Linus Torvalds <redacted>