CVS log for src/tests/dev/md/t_md.sh

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Keyword substitution: kv
Default branch: MAIN

Unfortunately rump does not provide the same magic as MAKEDEV does
for native /dev and create an alias for disk devices w/o partition
latter pointing at the raw partition, so for rump based tests we
actually have to calculate the concrete device name.

Use an idiom suggested by kre for this which also works for ports that
have kern.rawpartition > 4.

Instead of doing 'atf_check ... sh -c foo', just do 'atf_check ... -x foo'.

Sync with HEAD

convert tests from oldstyle dd rif/rof to newstyle dd | rump.dd

use rawpart

use rump.halt

cleanup server after use
(XXX: need better way to reboot it)

Get rid of the "sleep 1" by using rump_daemonize_begin/end().
Notably, md is a little tricky for this, since the ioctl that
configures the service also blocks in the kernel.  Therefore, use
an additional pthread to probe when the service is fully configured
and the server can detach.

Also, rawpart love.

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