[PATCH v2 0/3] fix `sudo make install` regression in maint

Mainly documentation (both in the manual and commit messages) and extended/cleaner tests with the following considerations :

 * able to run as root, and therefore removed reported issue with message
 * remove perl function for a sudo native alternative and a more reliable
   execution by making sure to avoid its PATH interceptions.
 * would likely need more changes to the test framework to avoid odities
   but the deficiencies are clearly visible until then, and so safe for
   backporting.

Carlo Marcelo Arenas Belón (3):
  git-compat-util: avoid failing dir ownership checks if running privileged
  Documentation: explain how safe.directory works when running under sudo
  t: add tests for safe.directory when running with sudo

 Documentation/config/safe.txt  |  9 ++++
 git-compat-util.h              | 40 +++++++++++++++-
 t/t0034-root-safe-directory.sh | 87 ++++++++++++++++++++++++++++++++++
 3 files changed, 135 insertions(+), 1 deletion(-)
 create mode 100755 t/t0034-root-safe-directory.sh