"git config --list" output was hard to parse when values consist of
multiple lines.  "--name-only" option is added to help this.

* sg/config-name-only:
  get_urlmatch: avoid useless strbuf write
  format_config: simplify buffer handling
  format_config: don't init strbuf
  config: restructure format_config() for better control flow
  completion: list variable names reliably with 'git config --name-only'
  config: add '--name-only' option to list only variable names

A new configuration variable http.sslVersion can be used to specify
what specific version of SSL/TLS to use to make a connection.

* ep/http-configure-ssl-version:
  http: add support for specifying the SSL version

* maint:
  pull: pass upload_pack only when it was given

The command-line completion script (in contrib/) has been updated.

* tb/complete-rebase-i-edit-todo:
  completion: offer '--edit-todo' during interactive rebase

git_path() and mkpath() are handy helper functions but it is easy
to misuse, as the callers need to be careful to keep the number of
active results below 4.  Their uses have been reduced.

* jk/git-path:
  memoize common git-path "constant" files
  get_repo_path: refactor path-allocation
  find_hook: keep our own static buffer
  refs.c: remove_empty_directories can take a strbuf
  refs.c: avoid git_path assignment in lock_ref_sha1_basic
  refs.c: avoid repeated git_path calls in rename_tmp_log
  refs.c: simplify strbufs in reflog setup and writing
  path.c: drop git_path_submodule
  refs.c: remove extra git_path calls from read_loose_refs
  remote.c: drop extraneous local variable from migrate_file
  prefer mkpathdup to mkpath in assignments
  prefer git_pathdup to git_path in some possibly-dangerous cases
  add_to_alternates_file: don't add duplicate entries
  t5700: modernize style
  cache.h: complete set of git_path_submodule helpers
  cache.h: clarify documentation for git_path, et al

"git pull" in recent releases of Git has a regression in the code
that allows custom path to the --upload-pack=<program>.  This has
been corrected.

Note that this is irrelevant for 'master' with "git pull" rewritten
in C.

* mm/pull-upload-pack:
  pull.sh: quote $upload_pack when passing it to git-fetch

"git subtree" (in contrib/) depended on "git log" output to be
stable, which was a no-no.  Apply a workaround to force a
particular date format.

* da/subtree-date-confusion:
  contrib/subtree: ignore log.date configuration

Teach git about a new option, "http.sslVersion", which permits one
to specify the SSL version to use when negotiating SSL connections.
The setting can be overridden by the GIT_SSL_VERSION environment
variable.

Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Rewrite "am" in "C".

* pt/am-builtin: (46 commits)
  git-am: add am.threeWay config variable
  builtin-am: remove redirection to git-am.sh
  builtin-am: check for valid committer ident
  builtin-am: implement legacy -b/--binary option
  builtin-am: implement -i/--interactive
  builtin-am: support and auto-detect mercurial patches
  builtin-am: support and auto-detect StGit series files
  builtin-am: support and auto-detect StGit patches
  builtin-am: rerere support
  builtin-am: invoke post-applypatch hook
  builtin-am: invoke pre-applypatch hook
  builtin-am: invoke applypatch-msg hook
  builtin-am: support automatic notes copying
  builtin-am: invoke post-rewrite hook
  builtin-am: implement -S/--gpg-sign, commit.gpgsign
  builtin-am: implement --committer-date-is-author-date
  builtin-am: implement --ignore-date
  builtin-am: pass git-apply's options to git-apply
  builtin-am: implement --[no-]scissors
  builtin-am: support --keep-cr, am.keepcr
  ...

One of the most common uses of git_path() is to pass a
constant, like git_path("MERGE_MSG"). This has two
drawbacks:

  1. The return value is a static buffer, and the lifetime
     is dependent on other calls to git_path, etc.

  2. There's no compile-time checking of the pathname. This
     is OK for a one-off (after all, we have to spell it
     correctly at least once), but many of these constant
     strings appear throughout the code.

This patch introduces a series of functions to "memoize"
these strings, which are essentially globals for the
lifetime of the program. We compute the value once, take
ownership of the buffer, and return the cached value for
subsequent calls.  cache.h provides a helper macro for
defining these functions as one-liners, and defines a few
common ones for global use.

Using a macro is a little bit gross, but it does nicely
document the purpose of the functions. If we need to touch
them all later (e.g., because we learned how to change the
git_dir variable at runtime, and need to invalidate all of
the stored values), it will be much easier to have the
complete list.

Note that the shared-global functions have separate, manual
declarations. We could do something clever with the macros
(e.g., expand it to a declaration in some places, and a
declaration _and_ a definition in path.c). But there aren't
that many, and it's probably better to stay away from
too-magical macros.

Likewise, if we abandon the C preprocessor in favor of
generating these with a script, we could get much fancier.
E.g., normalizing "FOO/BAR-BAZ" into "git_path_foo_bar_baz".
But the small amount of saved typing is probably not worth
the resulting confusion to readers who want to grep for the
function's definition.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>