KWSys 2018-12-12 (abb8c680)

Code extracted from:

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

at commit abb8c680927708b161f87fb596cefb454ef5e97d (master).

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

Ben Boeckel (3):
      b5b294c1 SystemTools::Split: fix copy-pasta comments
      ab0d44c9 SystemTools::Split: use str.find_first_of(char)
      a5caf8a4 cmake: support an alias target

Brad King (4):
      6b9c233c clang-format.bash: update to clang-format-6.0
      b7a341cf Empty commit at end of history preceding clang-format-6.0 style transition
      5d6f59fe SystemTools: Change SplitString return type to use std::string
      aebe4597 XL: Restore suppression of infinite loop warning in process test

Cristian Adam (1):
      993be8b6 Set CMake Policy CMP0069 to NEW within KWSys

Devin Nakamura (1):
      2cbf13d2 Terminal: Add support for z/OS terminal

E5ten (1):
      f17f22a2 Terminal: Add alacritty and alacritty-direct to VT100 color support whitelist

Gregor Jasny (1):
      228c60b8 SystemTools: CopyFileAlways: try to create a cheap CoW clone first

Isaiah Norton (1):
      4f9fb9aa SystemTools: Fix Touch to avoid requiring file ownership

Jon Chronopoulos (1):
      55a29eba SystemTools: Allow FileExists on Windows to follow symlinks

Kitware Robot (1):
      828b6837 Revise C++ coding style using clang-format-6.0

Marian Klymov (4):
      d06fcab7 SystemTools: Check source directory in CopyADirectory
      0b9f51a1 Remove redundant calls to c_str
      361e54e3 Get rid of redundant string initialization
      61501133 SystemInformation: Avoid use of dangling pointers on Solaris

Modestas Vainius (1):
      162b3ed7 SystemInformation: Fix compilation on GNU/{kFreeBSD,Hurd}

Peter Wu (1):
      898dc6b9 SystemTools: Fix GetLineFromStream to avoid libc++ bug on OS X 10.7

Roger Leigh (1):
      bdd39241 Process: On Windows do not open stdin file with write permission

luz.paz (1):
      0e14a1a6 Misc. typos and whitespace fixes