Log Message:
Changes 2.4.6:
* "git fetch --depth=<depth>" and "git clone \ 
--depth=<depth>" issued
  a shallow transfer request even to an upload-pack that does not
  support the capability.
* "git fsck" used to ignore missing or invalid objects recorded in reflog.
* The tcsh completion writes a bash scriptlet but that would have
  failed for users with noclobber set.
* Recent Mac OS X updates breaks the logic to detect that the machine
  is on the AC power in the sample pre-auto-gc script.
* "git format-patch --ignore-if-upstream A..B" did not like to be fed
  tags as boundary commits.