* master:
archive - leakfix for format_subst()
Make --no-thin the default in git-push to save server resources
fix doc for --compression argument to pack-objects
git-tag -s must fail if gpg cannot sign the tag.
git-svn: understand grafts when doing dcommit
git-diff: don't squelch the new SHA1 in submodule diffs
Define NO_MEMMEM on Darwin as it lacks the function
git-svn: fix "Malformed network data" with svn:// servers
(cvs|svn)import: Ask git-tag to overwrite old tags.
git-rebase: fix -C option
git-rebase: support --whitespace=<option>
Documentation / grammer nit
archive: rename attribute specfile to export-subst
archive: specfile syntax change: "$Format:%PLCHLDR$" instead of just "%PLCHLDR" (take 2)
add memmem()
Remove unused function convert_sha1_file()
archive: specfile support (--pretty=format: in archive files)
Export format_commit_message()