tests for sys/dev/clock_subr.c

Add a basic test for fss(4)

XXX For now, we just create required files (including mount-points)
XXX in the test's working directory. Eventually someone with more
XXX rump-foo than I should create a fss rump-component and then update
XXX the test to run under rump.

branches: 1.10.2;
Add some tests for the kernel HID parser.

Don't build tests that depend on RUMP if BSD_MK_COMPAT_FILE is defined.

Exclude tests that use rump

branches: 1.7.6;
"A few seconds later" I realized the kernel directory is dev/raidframe,
not dev/raid, so reflect this in the test dir. Affects location
for test of PR kern/44239.

Add first raidframe tests. This is the test for the kernel fault
described in PR kern/44239

Add simple test for md(4) which just stuffs junk into /dev/rmd0d
and checks the same data can be retrieved.

Add rudimentary cgd tests. The tests use cgd to transform a
plaintext into into an encrypted image and back into plaintext by
doing rump I/O on /dev/cgd. There is one test to check that giving
the same password for both encryption and decryption produces the
same plaintext and another to check that giving a different passwords
does not produce the same plaintext.

This could be fairly easily extended to test all feature of cgd
(hint hint). For example, now cgd.conf is included in cvs, but
the only reason for that is that without further hacking cgdconfig
uses /dev/random quality random to generate the salt for a
pkcsetcetc_kdf2 cgconfig -g, and making an automated test block on
the entropy pool is just not good form. Details are everything.

Test for cache sync noises after disk is ejected.

test case for PR kern/43785

Add test cases to check that sysmon/swwdog will panic and reboot
the kernel if left untickled.

Thanks to jmmv for the tip that doing this is possible in atf via
means of fork/wait.

Add test of pad(4): stuff some audio into /dev/audio, read it from
/dev/pad. Test that we got sensible output by comparing against
a previous audibly good result.

This exercises auconv, audio and pad.