- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Fix some conversions to keep clang happy.

Fix some clang warnings!

Add some colour to make it easy (well, easier) to see what the current
selected rates and current sample rates are.

(Note: when run under high traffic and with -s 0.1 the display becomes very
mesmerising. You've been warned.)

Add a '-s <timeout>' option which will display live rate control
statistics.

Tidy up the output quite substantially, making it fit well within
80 columns.

This makes it much easier to use in a shell script, to display a "top"
style output with live rate control data.

Break out the parsing code from main() and modularise things a little.

The eventual aim will be to support listing "one" and "all" stations for
the given ath device.

Tidy things up substantially:

* remove some debugging;
* introduce command line arguments;
* introduce support for non-ath0 interfaces.

Use the rate control table to display the rate rather than the rix,
making the output of this program much more meaningful.

Implement a first cut of the 'sample' rate statistics userland utility.

This outputs almost exactly the same information as the kernel sysctl does,
however the rix -> rate mapping isn't yet available as a TLV.