KWSys 2020-03-04 (6af2e592)

Code extracted from:

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

at commit 6af2e59217a7e10ed507da564a1445b60ac2a095 (master).

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

Hans Johnson (17):
      81d1e737 STYLE: Use modern path naming
      28b8e6c2 STYLE: Convert CMake-language commands to lower case
      6ce3d69a DOC: Update documentation for modern add_subdirectory.
      8a7fe7ac STYLE: Remove redundant void argument lists
      1c3e193d COMP: Use nullptr instead of 0 or NULL
      2a4c1252 STYLE: Replace integer literals which are cast to bool.
      0fe7214d STYLE: Make prototype match definition names
      3b30d0ff STYLE: Make prototype match definition names
      691d5612 PERF: readability container size empty
      7be4043f STYLE: Prefer c++11 'using' to 'typedef'
      acc916ed COMP: Prefer const pointer when value does not change
      4c7f64eb COMP: Prefer const member functions
      d07092a0 STYLE: Use default member initialization
      6d20e7c9 STYLE: Prefer = default to explicitly trivial implementations
      91429382 PERF: emplace_back method results in potentially more efficient code
      cc8fc323 STYLE: Use auto for variable type matches the type of the initializer
      6621b069 STYLE: Use range-based loops from C++11

Julien Schueller (1):
      a1a261ac CMake: Fix psapi lib name on case-sensitive fs