Log Message:
Changes 1.7.4.3:
* "git apply" used to confuse lines updated by previous hunks as lines
  that existed before when applying a hunk, contributing misapplication
  of patches with offsets.
* "git branch --track" (and "git checkout --track --branch") \ 
used to
  allow setting up a random non-branch that does not make sense to follow
  as the "upstream".  The command correctly diagnoses it as an error.
* "git checkout $other_branch" silently removed untracked symbolic links
  in the working tree that are in the way in order to check out paths
  under it from the named branch.
* "git cvsimport" did not bail out immediately when the cvs server cannot
  be reached, spewing unnecessary error messages that complain about the
  server response that it never got.
* "git diff --quiet" did not work very well with the \ 
"--diff-filter" option.
* "git grep -n" lacked a long-hand synonym --line-number.
* "git stash apply" reported the result of its operation by running
  "git status" from the top-level of the working tree; it should (and
  now does) run it from the user's working directory.