GIT 0.99.8b

GIT 0.99.8b maintenance release is found at the usual places:

    http://kernel.org/pub/software/scm/git/       - .rpm and tarball
    http://kernel.org/pub/software/scm/git/debian - .deb

Contains the following fixes since 0.99.8a.

Alex Riesen:
  hold_index_file_for_update should not unlink failed to open .lock files atexit

Christian Meder:
  Some typos and light editing of various manpages

Daniel Barkalow:
  Limit the number of requests outstanding in ssh-fetch.

Jonas Fonseca:
  Fix symbolic ref validation

Junio C Hamano:
  git-pull: do not barf on -a flag meant for git-fetch.
  Make sure get_sha1 does not accept ambiguous sha1 prefix (again).
  Avoid compiler warning.
  Remove unused external-diff script.
  Leave an empty line between log and sign-off.
  Remove useless use of sed in git-format-patch.
  Add missing documentation.
  Fix diff-filter All-Or-None mark.
  upload-pack: Do not choke on too many heads request.
  clone-pack: use create_symref() instead of raw symlink.
  GIT 0.99.8b

Santi_B$(BC)(Bjar:
  Quote the missing GIT_DIR.