is so that when we use a monitor that doesn't care about, say, writes,
we can avoid waisting the CPU required to parse them.

The four supported reports are:
    connect - connect() and close() notifications
    sockopt - Information about socket options
    io - read()s and write()s
    all - Duh. The default if none are given

You can specify reports by setting LIBNETMON_REPORTS or using the
new -r option to netmond. If you want more than one report type,
seperate them with commas.

Added a new control message, CM_REPORTS, to pass these back and forth
from netmond to libnetmon.

Added a long overdue LIBNETMON_NETMOND option which just uses the
standard socket paths to talk to netmond - this way, you don't have
to set them by hand when debugging, which is a huge PITA.