KWSys 2021-05-05 (e9ca4104)

Code extracted from:

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

at commit e9ca4104e816c28e3fcf94ce69fd75ca9498f4a7 (master).

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

Ben Boeckel (1):
      99ffa991 cmake: clear some configure checks when the deployment target changes

Martin Willers (2):
      bbf6cdef Terminal: Simplify CLICOLOR_FORCE check
      f308fcfb Terminal: Disable color output when CLICOLOR is set to 0