Merge branch 'master' of git://git.kernel.org/pub/scm/git/git

Merge branch 'master' of git://git./git/git

* 'master' of git://git.kernel.org/pub/scm/git/git: (53 commits)
  git-describe: use tags found in packed-refs correctly
  fetch-pack: check parse_commit/object results
  Update draft release notes for 1.5.5
  Update draft release notes for 1.5.4.4
  revert: actually check for a dirty index
  tests: introduce test_must_fail
  git-submodule: Fix typo 'url' which should be '$url'
  receive-pack: Initialize PATH to include exec-dir.
  Fix doc typos.
  fast-import: exit with proper message if not a git dir
  format-patch: wrap cover-letter's shortlog sensibly
  format-patch: use the diff options for the cover letter, too
  gitweb: Mark first match when searching commit messages
  Documentation: Remove --{min,max}-age option from git-log(1)
  cleanup: remove unused git_checkout_config
  Fix make_absolute_path() for parameters without a slash
  diff: make sure work tree side is shown as 0{40} when different
  diff-lib.c: constness strengthening
  Clean up find_unique_abbrev() callers
  find_unique_abbrev(): redefine semantics
  ...