merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 168 insertions, 0 deletions

diff --git a/third_party/git/Documentation/RelNotes/2.11.1.txt b/third_party/git/Documentation/RelNotes/2.11.1.txt
new file mode 100644
index 000000000000..9cd14c8197f9
--- /dev/null
+++ b/third_party/git/Documentation/RelNotes/2.11.1.txt
@@ -0,0 +1,168 @@
+Git v2.11.1 Release Notes
+=========================
+
+Fixes since v2.11
+-----------------
+
+ * The default Travis-CI configuration specifies newer P4 and GitLFS.
+
+ * The character width table has been updated to match Unicode 9.0
+
+ * Update the isatty() emulation for Windows by updating the previous
+   hack that depended on internals of (older) MSVC runtime.
+
+ * "git rev-parse --symbolic" failed with a more recent notation like
+   "HEAD^-1" and "HEAD^!".
+
+ * An empty directory in a working tree that can simply be nuked used
+   to interfere while merging or cherry-picking a change to create a
+   submodule directory there, which has been fixed..
+
+ * The code in "git push" to compute if any commit being pushed in the
+   superproject binds a commit in a submodule that hasn't been pushed
+   out was overly inefficient, making it unusable even for a small
+   project that does not have any submodule but have a reasonable
+   number of refs.
+
+ * "git push --dry-run --recurse-submodule=on-demand" wasn't
+   "--dry-run" in the submodules.
+
+ * The output from "git worktree list" was made in readdir() order,
+   and was unstable.
+
+ * mergetool.<tool>.trustExitCode configuration variable did not apply
+   to built-in tools, but now it does.
+
+ * "git p4" LFS support was broken when LFS stores an empty blob.
+
+ * Fix a corner case in merge-recursive regression that crept in
+   during 2.10 development cycle.
+
+ * Update the error messages from the dumb-http client when it fails
+   to obtain loose objects; we used to give sensible error message
+   only upon 404 but we now forbid unexpected redirects that needs to
+   be reported with something sensible.
+
+ * When diff.renames configuration is on (and with Git 2.9 and later,
+   it is enabled by default, which made it worse), "git stash"
+   misbehaved if a file is removed and another file with a very
+   similar content is added.
+
+ * "git diff --no-index" did not take "--no-abbrev" option.
+
+ * "git difftool --dir-diff" had a minor regression when started from
+   a subdirectory, which has been fixed.
+
+ * "git commit --allow-empty --only" (no pathspec) with dirty index
+   ought to be an acceptable way to create a new commit that does not
+   change any paths, but it was forbidden, perhaps because nobody
+   needed it so far.
+
+ * A pathname that begins with "//" or "\\" on Windows is special but
+   path normalization logic was unaware of it.
+
+ * "git pull --rebase", when there is no new commits on our side since
+   we forked from the upstream, should be able to fast-forward without
+   invoking "git rebase", but it didn't.
+
+ * The way to specify hotkeys to "xxdiff" that is used by "git
+   mergetool" has been modernized to match recent versions of xxdiff.
+
+ * Unlike "git am --abort", "git cherry-pick --abort" moved HEAD back
+   to where cherry-pick started while picking multiple changes, when
+   the cherry-pick stopped to ask for help from the user, and the user
+   did "git reset --hard" to a different commit in order to re-attempt
+   the operation.
+
+ * Code cleanup in shallow boundary computation.
+
+ * A recent update to receive-pack to make it easier to drop garbage
+   objects made it clear that GIT_ALTERNATE_OBJECT_DIRECTORIES cannot
+   have a pathname with a colon in it (no surprise!), and this in turn
+   made it impossible to push into a repository at such a path.  This
+   has been fixed by introducing a quoting mechanism used when
+   appending such a path to the colon-separated list.
+
+ * The function usage_msg_opt() has been updated to say "fatal:"
+   before the custom message programs give, when they want to die
+   with a message about wrong command line options followed by the
+   standard usage string.
+
+ * "git index-pack --stdin" needs an access to an existing repository,
+   but "git index-pack file.pack" to generate an .idx file that
+   corresponds to a packfile does not.
+
+ * Fix for NDEBUG builds.
+
+ * A lazy "git push" without refspec did not internally use a fully
+   specified refspec to perform 'current', 'simple', or 'upstream'
+   push, causing unnecessary "ambiguous ref" errors.
+
+ * "git p4" misbehaved when swapping a directory and a symbolic link.
+
+ * Even though an fix was attempted in Git 2.9.3 days, but running
+   "git difftool --dir-diff" from a subdirectory never worked. This
+   has been fixed.
+
+ * "git p4" that tracks multile p4 paths imported a single changelist
+   that touches files in these multiple paths as one commit, followed
+   by many empty commits.  This has been fixed.
+
+ * A potential but unlikely buffer overflow in Windows port has been
+   fixed.
+
+ * When the http server gives an incomplete response to a smart-http
+   rpc call, it could lead to client waiting for a full response that
+   will never come.  Teach the client side to notice this condition
+   and abort the transfer.
+
+ * Some platforms no longer understand "latin-1" that is still seen in
+   the wild in e-mail headers; replace them with "iso-8859-1" that is
+   more widely known when conversion fails from/to it.
+
+ * Update the procedure to generate "tags" for developer support.
+
+ * Update the definition of the MacOSX test environment used by
+   TravisCI.
+
+ * A few git-svn updates.
+
+ * Compression setting for producing packfiles were spread across
+   three codepaths, one of which did not honor any configuration.
+   Unify these so that all of them honor core.compression and
+   pack.compression variables the same way.
+
+ * "git fast-import" sometimes mishandled while rebalancing notes
+   tree, which has been fixed.
+
+ * Recent update to the default abbreviation length that auto-scales
+   lacked documentation update, which has been corrected.
+
+ * Leakage of lockfiles in the config subsystem has been fixed.
+
+ * It is natural that "git gc --auto" may not attempt to pack
+   everything into a single pack, and there is no point in warning
+   when the user has configured the system to use the pack bitmap,
+   leading to disabling further "gc".
+
+ * "git archive" did not read the standard configuration files, and
+   failed to notice a file that is marked as binary via the userdiff
+   driver configuration.
+
+ * "git blame --porcelain" misidentified the "previous" <commit, path>
+   pair (aka "source") when contents came from two or more files.
+
+ * "git rebase -i" with a recent update started showing an incorrect
+   count when squashing more than 10 commits.
+
+ * "git <cmd> @{push}" on a detached HEAD used to segfault; it has
+   been corrected to error out with a message.
+
+ * Tighten a test to avoid mistaking an extended ERE regexp engine as
+   a PRE regexp engine.
+
+ * Typing ^C to pager, which usually does not kill it, killed Git and
+   took the pager down as a collateral damage in certain process-tree
+   structure.  This has been fixed.
+
+Also contains various documentation updates and code clean-ups.