What's in git.git (stable)

I will do a v1.5.2.1 with 'maint' and push it out this weekend.

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* The 'maint' branch has these fixes since the last announcement.

 Frank Lichtenheld (2):
  git-config: Various small fixes to asciidoc documentation
  git-config: Improve documentation of git-config file handling

 Jeff King (1):
  Documentation: robustify asciidoc GIT_VERSION replacement

 Jerald Fitzjerald (1):
  decode_85(): fix missing return.

 Josh Triplett (1):
  Create a new manpage for the gitignore format, and reference it elsewhere

 Kristian Høgsberg (1):
  Use =20 when rfc2047 encoding spaces.

 Linus Torvalds (1):
  fix signed range problems with hex conversions

* The 'master' branch has these since the last announcement
  in addition to the above.

 James Bowes (1):
  rev-parse: Identify short sha1 sums correctly.

 Jonas Fonseca (2):
  Fix git-am(1) synopsis formatting
  git-rebase: suggest to use git-add instead of git-update-index

 Julian Phillips (1):
  Makefile: Use generic rule to build test programs

 Junio C Hamano (1):
  Add DLH to .mailmap

 Martin Koegler (4):
  builtin-pack-objects: don't fail, if delta is not possible
  git-pack-objects: cache small deltas between big objects
  builtin-pack-object: cache small deltas
  diff-delta: use realloc instead of xrealloc

 Nicolas Pitre (2):
  fix repack with --max-pack-size
  always start looking up objects in the last used pack first

 Shawn O. Pearce (7):
  Lazily open pack index files on demand
  Micro-optimize prepare_alt_odb
  Attempt to delay prepare_alt_odb during get_sha1
  Test for recent rev-parse $abbrev_sha1 regression
  Simplify index access condition in count-objects, pack-redundant
  Ensure the pack index is opened before access
  Style nit - don't put space after function names

 Theodore Ts'o (1):
  Fix minor grammatical typos in the git-gc man page