new wiki page to collect information about the ATA subsystem

[Mark Linimon]

Jeremy Chadwick (koitsu@) has been gathering together information on
the wiki about commonly seen problems with FreeBSD:

  http://wiki.freebsd.org/JeremyChadwick/Commonly_reported_issues
  http://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting

Based on a discussion on #freebsd-bugbusters, I've gone ahead and added
a signup page for people that are interested in volunteering to do ATA
regression testing (either for patches that are included in the various
PRs, or for isolating regressions that have already happened):

  http://wiki.freebsd.org/ATA/ATA_Volunteers

Please feel free to sign up if you're interested in helping on this.
Perhaps it will lead to something.

There is also a new meta-page to cross-reference the above:

  http://wiki.freebsd.org/ATA

mcl