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

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/Documentation/git-http-push.txt

@@ -0,0 +1,97 @@
+git-http-push(1)
+================
+
+NAME
+----
+git-http-push - Push objects over HTTP/DAV to another repository
+
+
+SYNOPSIS
+--------
+[verse]
+'git http-push' [--all] [--dry-run] [--force] [--verbose] <url> <ref> [<ref>...]
+
+DESCRIPTION
+-----------
+Sends missing objects to remote repository, and updates the
+remote branch.
+
+*NOTE*: This command is temporarily disabled if your libcurl
+is older than 7.16, as the combination has been reported
+not to work and sometimes corrupts repository.
+
+OPTIONS
+-------
+--all::
+	Do not assume that the remote repository is complete in its
+	current state, and verify all objects in the entire local
+	ref's history exist in the remote repository.
+
+--force::
+	Usually, the command refuses to update a remote ref that
+	is not an ancestor of the local ref used to overwrite it.
+	This flag disables the check.  What this means is that
+	the remote repository can lose commits; use it with
+	care.
+
+--dry-run::
+	Do everything except actually send the updates.
+
+--verbose::
+	Report the list of objects being walked locally and the
+	list of objects successfully sent to the remote repository.
+
+-d::
+-D::
+	Remove <ref> from remote repository.  The specified branch
+	cannot be the remote HEAD.  If -d is specified the following
+	other conditions must also be met:
+
+	- Remote HEAD must resolve to an object that exists locally
+	- Specified branch resolves to an object that exists locally
+	- Specified branch is an ancestor of the remote HEAD
+
+<ref>...::
+	The remote refs to update.
+
+
+SPECIFYING THE REFS
+-------------------
+
+A '<ref>' specification can be either a single pattern, or a pair
+of such patterns separated by a colon ":" (this means that a ref name
+cannot have a colon in it).  A single pattern '<name>' is just a
+shorthand for '<name>:<name>'.
+
+Each pattern pair consists of the source side (before the colon)
+and the destination side (after the colon).  The ref to be
+pushed is determined by finding a match that matches the source
+side, and where it is pushed is determined by using the
+destination side.
+
+ - It is an error if <src> does not match exactly one of the
+   local refs.
+
+ - If <dst> does not match any remote ref, either
+
+   * it has to start with "refs/"; <dst> is used as the
+     destination literally in this case.
+
+   * <src> == <dst> and the ref that matched the <src> must not
+     exist in the set of remote refs; the ref matched <src>
+     locally is used as the name of the destination.
+
+Without `--force`, the <src> ref is stored at the remote only if
+<dst> does not exist, or <dst> is a proper subset (i.e. an
+ancestor) of <src>.  This check, known as "fast-forward check",
+is performed in order to avoid accidentally overwriting the
+remote ref and lose other peoples' commits from there.
+
+With `--force`, the fast-forward check is disabled for all refs.
+
+Optionally, a <ref> parameter can be prefixed with a plus '+' sign
+to disable the fast-forward check only on that ref.
+
+GIT
+---
+Part of the linkgit:git[1] suite