Sync with 2.31.2

* maint-2.31:
  Git 2.31.2
  Git 2.30.3
  setup_git_directory(): add an owner check for the top-level directory
  Add a function to determine whether a path is owned by the current user

Documentation/RelNotes/2.30.3.txt

@@ -0,0 +1,24 @@
+Git v2.30.2 Release Notes
+=========================
+
+This release addresses the security issue CVE-2022-24765.
+
+Fixes since v2.30.2
+-------------------
+
+ * Build fix on Windows.
+
+ * Fix `GIT_CEILING_DIRECTORIES` with Windows-style root directories.
+
+ * CVE-2022-24765:
+   On multi-user machines, Git users might find themselves
+   unexpectedly in a Git worktree, e.g. when another user created a
+   repository in `C:\.git`, in a mounted network drive or in a
+   scratch space. Merely having a Git-aware prompt that runs `git
+   status` (or `git diff`) and navigating to a directory which is
+   supposedly not a Git worktree, or opening such a directory in an
+   editor or IDE such as VS Code or Atom, will potentially run
+   commands defined by that other user.
+
+Credit for finding this vulnerability goes to 俞晨东; The fix was
+authored by Johannes Schindelin.

Documentation/RelNotes/2.31.2.txt

@@ -0,0 +1,6 @@
+Git v2.31.2 Release Notes
+=========================
+
+This release merges up the fixes that appear in v2.30.3 to address
+the security issue CVE-2022-24765; see the release notes for that
+version for details.

Documentation/config.txt

@@ -440,6 +440,8 @@ include::config/rerere.txt[]
 
 include::config/reset.txt[]
 
+include::config/safe.txt[]
+
 include::config/sendemail.txt[]
 
 include::config/sequencer.txt[]

Documentation/config/safe.txt

@@ -0,0 +1,21 @@
+safe.directory::
+	These config entries specify Git-tracked directories that are
+	considered safe even if they are owned by someone other than the
+	current user. By default, Git will refuse to even parse a Git
+	config of a repository owned by someone else, let alone run its
+	hooks, and this config setting allows users to specify exceptions,
+	e.g. for intentionally shared repositories (see the `--shared`
+	option in linkgit:git-init[1]).
++
+This is a multi-valued setting, i.e. you can add more than one directory
+via `git config --add`. To reset the list of safe directories (e.g. to
+override any such directories specified in the system config), add a
+`safe.directory` entry with an empty value.
++
+This config setting is only respected when specified in a system or global
+config, not when it is specified in a repository config or via the command
+line option `-c safe.directory=<path>`.
++
+The value of this setting is interpolated, i.e. `~/<path>` expands to a
+path relative to the home directory and `%(prefix)/<path>` expands to a
+path relative to Git's (runtime) prefix.