Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Remove unused variable.

Found with: Coverity Prevent(tm)
CID: 4138

Don't call destroy_dev on the alias. This fixes half a dozen PRs I think.

Create a /dev/cardbus%d.cis, to be compatible with older versions of
the software. This is a trivial amount of code to keep wireless
monitoring software working... I plan on removing it in 9.0.

Overhaul of CIS parsing, next step: keep a cached copy of the CIS,
read before we configure the card, so we can implement
/dev/cardbus*.cis. Also, do this on a per-child basis, so we now have
a different name than before. I think i'll have to fix that for some
legacy tools to keep working.

I can now do a dumpcis on my running atheros card and have it still work!

First step in cleaning up CIS parsing and /dev/cardbus*.cis: remove
redundant malloc/free. Add comments about how this should really be
done. Fix an overly verbose comment about under 1MB mapping: go ahead
and set the bits, but we ignore them.

Implement /dev/cardbus%d.cis, same thing as /dev/pccard%d.cis. There
are some rough edges with this still, but it seems to work well enough
to commit.