Sync with 2.30.3

* maint-2.30:
  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

diff --cc Documentation/config.txt
Simple merge

diff --cc compat/mingw.h
Simple merge

diff --cc git-compat-util.h
Simple merge

diff --cc t/t0060-path-utils.sh
Simple merge