Update to git-1.6.0.6, and (mostly) sync specfile with F-10 branch
- Enable parallel delta searching when packing objects (Roland McGrath)
- Consolidate build/install options in %make_git (Roland McGrath)
- Require perl(Authen::SASL) in git-email (bug 483062)
- Exclude vc-git.el from emacs-git (bug 479531)
- Change /srv/git to %{_var}/lib/git
- Drop redundant libcurl Requires
- Update URL field