- Consistently use err/errx/warnx throughout, rather than using perror()
and exit().
- Teach the tests how to better manage (and therefore test) privilege:
in particular, how to create sockes with root credentials but exercise
the privileges with non-root credentials, etc.
- Teach the test suite to apply each of the non-IP_HDRINCL options across
each of SOCK_DGRAM, SOCK_STREAM, and SOCK_RAW.
atempts to read and write various IP-level socket options as root and
nobody, making sure the initial values are as expected, that they can
be changed to valid values and take effect, etc. No attempt is made
to check for the correct implementation of side effects (such as
changes in packet headers) as yet.
The IP options section is currently broken but will be fixed shortly.
Not all multicast options are currently tested.
