Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

oops - mis-commit.

Convert this over to use the new cdev based ioctl path.

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

Add a very basic and totally hacked up iwnstats program.

This just extracts the current statistics out from the NIC via
the new ioctl API and displays them. It runs every 100ms to hopefully
grab the latest statistics.

I may eventually teach this to use libstatfoo like what has been done
for athstats and such; but this is good enough for now for people to
do some basic investigation.

Tested:

* Intel Centrino 6205