Remove $FreeBSD$: one-line bare tag

Remove /^\s*\$FreeBSD\$$\n/

Revert "wpa: Import wpa 2.10."

This reverts commit 5eb81a4b4028113e3c319f21a1db6b67613ec7ab, reversing
changes made to c6806434e79079f4f9419c3ba4fec37efcaa1635 and
this reverts commit 679ff6112361d2660f4e0c3cda71198a5e773a25.

What happend is git rebase --rebase-merges doesn't do what is expected.

wpa: Import wpa 2.10

The long awaited wpa 2.10 is finally here.

Import wpa_supplicant/hostapd commit 9d9b42306541

Start tracking upstream development of hostapd and wpa_supplicant more
closely. The last upstream release is from August 2019. Keeping up
with upstream development will make importing releases less exciting.

Discussed with: cy
Sponsored by: Rubicon Communications, LLC ("Netgate")

Do not recommend to install kyua with pkg in the tests README

Kyua is now available in the base system.

While here, reword the usage section a bit.

Copy README into /usr/tests

Add a few sentences describing how to run the tests.

Reviewed by: ngie
Differential Revision: https://reviews.freebsd.org/D4224

Vendor import of file 5.19.

Install category Kyuafiles from their category directories.

Move the installation of /usr/tests/lib/Kyuafile from src/tests/lib/
to src/lib/. This is to keep the src/tests/ hierarchy unaware of the
rest of the tree, which makes things clearer in general. In particular:

1) Everything related to the construction of /usr/tests/lib/ is kept
in src/lib/. There is no need to think about different directories
and how they relate to each other. (The same applies for libexec,
usr.bin, etc. but these are not yet handled.)

2) src/tests becomes the place to keep cross-functional test programs
and nothing else, which also helps in simplifying things.

Reviewed by: freebsd-testing
Approved by: rpaulo (mentor)

Set up the /usr/tests hierarchy.

Populate /usr/tests with the only test programs that currently live
in the tree (those in lib/libcrypt/tests/) and add all the build
machinery to accompany this change.

In particular:

- Add a WITHOUT_TESTS variable that users can define to request that
no tests be put in /usr/tests.
- Add a top-level Kyuafile for /usr/tests and a way to create similar
Kyuafiles in top-level subdirectories.
- Add a BSD.tests.dist file to define the directory layout of
/usr/tests.

Submitted by: Julio Merino jmmv google.com
Reviewed by: sjg
MFC after: 2 weeks

Virgin import of Christos Zoulas's FILE 4.26.