Log Message:
misc/py-anita: update to 2.0.

Changes from 1.49:

In the test suite, run the tests in parallel to reduce the run time.

Downloads can now be interrupted using SIGINT (control-C).

On NetBSD, invoke makefs using its absolute path /usr/sbin/makefs
as /usr/sbin may not be in PATH.

Add support for Python 3.

When using qemu from pkgsrc, log the exact pkgsrc version of qemu and
glib2, including any nb suffix.