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Run the `clang-format.bash` script to update all our C and C++ code to a new
style defined by `.clang-format`.  Use `clang-format` version 3.8.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

Change-Id: Ie3aedc03bfe5c3999d4a077fafb8c6f3bbffc5c5

Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace KWSys per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online
information available from "https://cmake.org/licensing#kwsys".

Run the `filter-notices.bash` script to perform the replacements mechanically.
Manually fix up the shebang line in one file.

Change-Id: I8497f7c868664dcf54a8608ab302ad93c860b334

Drop "kwsys/stl/*" and "kwsys_stl::" and use the standard headers and
namespace instead.  Drop the now-unused KWSYS_STL_HAVE_STD check.

Change-Id: I6105fd32cd8f0e487e03f58927976e824a53f0d8

Use the standard headers and namespace instead.  We no longer support
compilers without them.

Change-Id: Iafb19d28462e9302df06eecc8ae42b48a9577a21

It's not needed and just clutters the code.

Change-Id: I9e69621be79b8bfebe6790edae4cdb86e8389733

Mostly add 'static' to private functions/globals.

Change-Id: Ic7fa75bcc0f245e7b4f8d554db4f58ac0c585e2a

This converts the KWSys license to a pure 3-clause OSI-approved BSD
License.  We drop the previous license clause requiring modified
versions to be plainly marked.  We also update the KWSys copyright to
cover the full development time range.

ENH: Add support for multi-arguments: -f arg1 arg2 arg3 ... and support for lists: -f arg1 -f arg2 -f arg3 ... and for boolean to be stored as strings and doubles

COMP: Adding work-around for CMake dependency scanning limitation.  Any configured header included by KWSYS_HEADER() in a .c or .cxx file in kwsys itself must use this hack to get dependencies.

ENH: Do kwsys testing as part of cmake testing, command line arguments are not experimental and add simple test for systemtools