MFC r293821:

Integrate
tools/regression/geom_{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}
in to the FreeBSD test suite as
tests/sys/geom/class/{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}

The tools/regression/geom and tools/regression/geom_part testcases are being
left alone because both test sets are both currently broken.

The majority of this work was done on ^/user/ngie/more-tests2 . The differences
are as follows:
- tests/sys/geom/class/Makefile.inc is not present; it was
inlined into the class's Makefiles for explicitness.
- The testcases officially require root via kyua
- The geom_gate(4) tests don't use the pidfile changes proposed in
https://reviews.freebsd.org/D4836 .

Integrate
tools/regression/geom_{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}
in to the FreeBSD test suite as
tests/sys/geom/class/{concat,eli,gate,mirror,nop,raid3,shsec,stripe,uzip}

The tools/regression/geom and tools/regression/geom_part testcases are being
left alone because both test sets are both currently broken.

The majority of this work was done on ^/user/ngie/more-tests2 . The differences
are as follows:
- tests/sys/geom/class/Makefile.inc is not present; it was
inlined into the class's Makefiles for explicitness.
- The testcases officially require root via kyua
- The geom_gate(4) tests don't use the pidfile changes proposed in
https://reviews.freebsd.org/D4836 .

MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division

- Add a geom_shsec specific cleanup function and trap on that function at
exit so things are cleaned up properly
- Use attach_md for attaching md(4) devices
- Don't hardcode /tmp for temporary files, which violates the kyua sandbox

MFC after: 3 weeks
Sponsored by: EMC / Isilon Storage Division

Use randomly generated device names in testcases via mktemp -u instead of using
the hardcoded device name, "test"

MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

Convert gshsec(8) regression tests to the new framework.

Introduce a new GEOM class - SHSEC. It provides sharing secret between
the given providers. Without even one of the configured components there
should be no way to get the secret.

Supported by: WHEEL Sp. z o.o.
http://www.wheel.pl