1.  Add README.txt with upgrade instructions as well as license info
    and governance.
2.  Add FREEBSD-Xlist to prune the distribution.
3.  Remove files & directories not used by FreeBSD.
Import atf-0.17:

Experimental version released on February 14th, 2013.

* Added the atf_utils_cat_file, atf_utils_compare_file,
  atf_utils_copy_file, atf_utils_create_file, atf_utils_file_exists,
  atf_utils_fork, atf_utils_grep_file, atf_utils_grep_string,
  atf_utils_readline, atf_utils_redirect and atf_utils_wait utility
  functions to atf-c-api.  Documented the already-public
  atf_utils_free_charpp function.

* Added the cat_file, compare_file, copy_file, create_file, file_exists,
  fork, grep_collection, grep_file, grep_string, redirect and wait
  functions to the atf::utils namespace of atf-c++-api.  These are
  wrappers around the same functions added to the atf-c-api library.

* Added the ATF_CHECK_MATCH, ATF_CHECK_MATCH_MSG, ATF_REQUIRE_MATCH and
  ATF_REQUIRE_MATCH_MSG macros to atf-c to simplify the validation of a
  string against a regular expression.

* Miscellaneous fixes for manpage typos and compilation problems with
  clang.

* Added caching of the results of those configure tests that rely on
  executing a test program.  This should help crossbuild systems by
  providing a mechanism to pre-specify what the results should be.

* X-NetBSD-PR bin/45690: Make atf-report convert any non-printable
  characters to a plain-text representation (matching their
  corresponding hexadecimal entities) in XML output files.  This is to
  prevent the output of test cases from breaking xsltproc later.

Note that this import, compared to the one for 0.16, brings in all the
files that are part of the release.  This is to follow the Subversion
Primer guidelines, which mention that all files should be imported first
and only dropped when merging into contrib/atf/.

Approved by:	rpaulo (mentor)
Import atf-0.18:

Experimental version released on November 16th, 2013.

* Issue 45: Added require.memory support in atf-run for FreeBSD.

* Fixed an issue with the handling of cin with libc++.

* Issue 64: Fixed various mandoc formatting warnings.

* X-NetBSD-PR bin/48284: Made atf-check flush its progress message to
  stdout so that an interrupted test case always shows the last message
  being executed.

* X-NetBSD-PR bin/48285: Fixed atf_check examples in atf-sh-api(3).

Approved by:	rpaulo (mentor)
MFV: Import atf-0.18.

Approved by:	rpaulo (mentor)