Skip some permissions checks on Cygwin

Andrew Dunstan <andrew@dunslane.net>

Commit: 0e51485392c0c457de0709181a3d2bfdba6f3fb6
Author: Andrew Dunstan <andrew@dunslane.net>
Date: 2024-06-13T11:42:14Z
Releases: 14.13
Skip some permissions checks on Cygwin

These are checks that are already skipped on other Windows systems.

Backpatch to all live branches, as appropriate.

Files