Merge 'build-in git-mktree'

* commit '633e3556ccbc': (5835 commits) build-in git-mktree allow -t abbreviation for --track in git branch gitweb: Remove function prototypes (cleanup) Documentation: cloning to empty directory is allowed Clarify kind of conflict in merge-one-file helper git config: clarify --add and --get-color archive-tar.c: squelch a type mismatch warning Start 1.6.4 development Start 1.6.3.1 maintenance series. GIT 1.6.3 t4029: use sh instead of bash t4200: convert sed expression which operates on non-text file to perl t4200: remove two unnecessary lines t/annotate-tests.sh: avoid passing a non-newline terminated file to sed t4118: avoid sed invocation on file without terminating newline t4118: add missing '&&' t8005: use egrep when extended regular expressions are required git-clean doc: the command only affects paths under $(cwd) improve error message in config.c t4018-diff-funcname: add cpp xfuncname pattern to syntax test ...