Not-so-recent rewrite of "git am" that started making internal
calls into the commit machinery had an unintended regression, in
that no matter how many seconds it took to apply many patches, the
resulting committer timestamp for the resulting commits were all
the same.

* jk/reset-ident-time-per-commit:
  am: reset cached ident date for each patch

* maint:
  Hopefully final batch for 2.9.3

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The API documentation for hashmap was unclear if hashmap_entry
can be safely discarded without any other consideration.  State
that it is safe to do so.

* jc/hashmap-doc-init:
  hashmap: clarify that hashmap_entry can safely be discarded

The build procedure learned PAGER_ENV knob that lists what default
environment variable settings to export for popular pagers.  This
mechanism is used to tweak the default settings to MORE on FreeBSD.

* ew/build-time-pager-tweaks:
  pager: move pager-specific setup into the build

Doc update.

* sb/submodule-recommend-shallowness:
  gitmodules: document shallow recommendation

A small memory leak in the command line parsing of "git blame"
has been plugged.

* jk/parseopt-string-list:
  blame: drop strdup of string literal

A minor documentation update.

* jh/clean-smudge-f-doc:
  clarify %f documentation

Squelch compiler warnings for netmalloc (in compat/) library.

* js/nedmalloc-gcc6-warnings:
  nedmalloc: work around overzealous GCC 6 warning
  nedmalloc: fix misleading indentation

FreeBSD can lie when asked mtime of a directory, which made the
untracked cache code to fall back to a slow-path, which in turn
caused tests in t7063 to fail because it wanted to verify the
behaviour of the fast-path.

* nd/fbsd-lazy-mtime:
  t7063: work around FreeBSD's lazy mtime update feature

An entry "git log --decorate" for the tip of the current branch is
shown as "HEAD -> name" (where "name" is the name of the branch);
paint the arrow in the same color as "HEAD", not in the color for
commits.

* nd/log-decorate-color-head-arrow:
  log: decorate HEAD -> branch with the same color for arrow and HEAD

* rs/use-strbuf-addstr:
  use strbuf_addstr() instead of strbuf_addf() with "%s"
  use strbuf_addstr() for adding constant strings to a strbuf

Micro optimization of st_mult() facility used to check the integer
overflow coming from multiplication to compute size of memory
allocation.

* rs/st-mult:
  pass constants as first argument to st_mult()

The t3700 test about "add --chmod=-x" have been made a bit more
robust and generally cleaned up.

* ib/t3700-add-chmod-x-updates:
  t3700: add a test_mode_in_index helper function
  t3700: merge two tests into one
  t3700: remove unwanted leftover files before running new tests

The characters in the label shown for tags/refs for commits in
"gitweb" output are now properly escaped for proper HTML output.

* ab/gitweb-link-html-escape:
  gitweb: escape link body in format_ref_marker

"git pack-objects" has a few options that tell it not to pack
objects found in certain packfiles, which require it to scan .idx
files of all available packs.  The codepaths involved in these
operations have been optimized for a common case of not having any
non-local pack and/or any .kept pack.

* jk/pack-objects-optim:
  pack-objects: compute local/ignore_pack_keep early
  pack-objects: break out of want_object loop early
  find_pack_entry: replace last_found_pack with MRU cache
  add generic most-recently-used list
  sha1_file: drop free_pack_by_name
  t/perf: add tests for many-pack scenarios

"git difftool <paths>..." started in a subdirectory failed to
interpret the paths relative to that directory, which has been
fixed.

* jk/difftool-in-subdir:
  difftool: use Git::* functions instead of passing around state
  difftool: avoid $GIT_DIR and $GIT_WORK_TREE
  difftool: fix argument handling in subdirs

More i18n marking.

* va/i18n:
  i18n: config: unfold error messages marked for translation
  i18n: notes: mark comment for translation

Regression fix for an i18n topic already in 'master'.

* js/rebase-i-progress-tidy:
  rebase-interactive: trim leading whitespace from progress count

The reflog output format is documented better, and a new format
--date=unix to report the seconds-since-epoch (without timezone)
has been added.

* jk/reflog-date:
  date: clarify --date=raw description
  date: add "unix" format
  date: document and test "raw-local" mode
  doc/pretty-formats: explain shortening of %gd
  doc/pretty-formats: describe index/time formats for %gd
  doc/rev-list-options: explain "-g" output formats
  doc/rev-list-options: clarify "commit@{Nth}" for "-g" option

* cp/completion-clone-recurse-submodules:
  completion: add option '--recurse-submodules' to 'git clone'

Test modernization.

* jk/t4205-cleanup:
  t4205: indent here documents
  t4205: drop top-level &&-chaining

Style fixes for "git subtree" (in contrib/).

* da/subtree-modernize:
  subtree: adjust function definitions to match CodingGuidelines
  subtree: adjust style to match CodingGuidelines

Hotfix of a test in a topic that has already been merged to 'master'.

* nd/fetch-ref-summary:
  t5510: skip tests under GETTEXT_POISON build

Tests for "git svn" have been taught to reuse the lib-httpd test
infrastructure when testing the subversion integration that
interacts with subversion repositories served over the http://
protocol.

* ew/git-svn-http-tests:
  git svn: migrate tests to use lib-httpd
  t/t91*: do not say how to avoid the tests

Windows port was failing some tests in t4130, due to the lack of
inum in the returned values by its lstat(2) emulation.

* js/t4130-rename-without-ino:
  t4130: work around Windows limitation

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

A doc update.

* sb/pack-protocol-doc-nak:
  Documentation: pack-protocol correct NAK response

Code cleanup.

* rs/submodule-config-code-cleanup:
  submodule-config: fix test binary crashing when no arguments given
  submodule-config: combine early return code into one goto
  submodule-config: passing name reference for .gitmodule blobs
  submodule-config: use explicit empty string instead of strbuf in config_from()

A comment update for a topic that was merged to Git v2.8.

* sb/submodule-deinit-all:
  submodule deinit: remove outdated comment

Code simplification.

* rs/worktree-use-strbuf-absolute-path:
  worktree: use strbuf_add_absolute_path() directly

Belated doc update for a feature added in v1.8.5.

* jc/doc-diff-filter-exclude:
  diff: document diff-filter exclusion

Build clean-up.

* nd/test-helpers:
  t/test-lib.sh: fix running tests with --valgrind
  Makefile: use VCSSVN_LIB to refer to svn library
  Makefile: drop extra dependencies for test helpers

Code cleanup.

* rs/use-strbuf-addbuf:
  strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf()
  use strbuf_addbuf() for appending a strbuf to another

Code simplification.

* lf/recv-sideband-cleanup:
  sideband.c: small optimization of strbuf usage
  sideband.c: refactor recv_sideband()

Grammofix.

* ah/unpack-trees-advice-messages:
  unpack-trees: fix English grammar in do-this-before-that messages

A small internal API cleanup.

* lf/sideband-returns-void:
  upload-pack.c: make send_client_data() return void
  sideband.c: make send_sideband() return void

Code clean-up.

* jk/send-pack-stdio:
  write_or_die: remove the unused write_or_whine() function
  send-pack: use buffered I/O to talk to pack-objects

Code clean-up.

* pb/commit-editmsg-path:
  builtin/commit.c: memoize git-path for COMMIT_EDITMSG

Recent FreeBSD stopped making perl available at /usr/bin/perl;
switch the default the built-in path to /usr/local/bin/perl on not
too ancient FreeBSD releases.

* ew/find-perl-on-freebsd-in-local:
  config.mak.uname: correct perl path on FreeBSD