KWSys 2022-06-03 (c28e27bc)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit c28e27bc4ad8e12d88b05f30eec19b2987c60721 (master).

Upstream Shortlog
-----------------

Brad King (3):
      591c4efb Activate POSIX APIs even without compiler extensions
      45f20b83 Fix XL/XLClang warning suppression under CMP0089 NEW behavior
      257b1111 Configure with policies through CMake 3.22
5 files changed