Kitware Robot authored Jan 23, 2018 and Brad King committed Jan 24, 2018

Code extracted from:

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

at commit 0579db1c97715f9936523dd473c0ed7613b68e68 (master).

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

Ben Boeckel (1):
      3e807fd6 cmake: specify source file extensions

Brad King (1):
      38855ca1 Set CMP0042 explicitly with CMake 3.0 and above

Chuck Atkins (1):
      4ca97fc6 SystemTools: Disable getpwnam for static linux builds

Hans Johnson (1):
      7d7f3b2d Configure: Add KWSYS_NULLPTR macro for C++ code

Sankhesh Jhaveri (1):
      20c458d0 Set CMP0022 policy to new to provide link interface definitions

Sean McBride (1):
      c6829e4d Fixed a few comments, mostly regarding base 2 vs base 10 sizes

luz.paz (1):
      4b67f965 Remove superfluous double whitespace in appropriate places