Log Message:
misc/py-anita: update to 2.2.

Changes from 2.1:

Clean up some b'' quoting that appeared around strings in the log
output under python3.

New command line option --image-format for selecting the guest disk
image format.  Supported values are "dense" (the default) and
"sparse".

Reset the install timeout whenever a new set extraction or other
command is started by sysinst, and reduce the timeout to 1 hour.
This allows hangs in the install phase to be detected more quickly.

Reset the test timeout whenever a new test program is started by ATF,
and reduce the default timeout to 2 hours.  If you are passing a
non-default test timeout with the --test-timeout option, it can also
be reduced.  This allows hangs during test runs to be detected more
quickly.

Fix the sparc64 CD install which was broken in 2.1, by adding an
index=2 attribute to the virtual CD drive.

Make NetBSD-current/macppc boot by passing "-prom-env qemu_boot_hack=y"
to qemu-system-ppc.  From Joerg Sonnenberger.