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

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

MFC r233909:

Add Bv9ARM.pdf to the list of docs to install.

MFV/MFC r233914:

Update to version 9.8.2, the latest from ISC, which contains numerous bug fixes.

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

Approved by: re (implicit)

bmake and other updates necessary for the BIND 9.8.x upgrade.

This includes a structural change regarding atomic ops. Previously they
were enabled on all platforms unless we had knowledge that they did not
work. However both work performed by marius@ on sparc64 and the fact that
the 9.8.x branch is fussier in this area has demonstrated that this is
not a safe approach. So I've modified a patch provided by marius to
enable them for i386, amd64, and ia64 only.

Update BIND to version 9.6.1rc1. This version has better performance and
lots of new features compared to 9.4.x, including:

Full NSEC3 support
Automatic zone re-signing
New update-policy methods tcp-self and 6to4-self
DHCID support.
More detailed statistics counters including those supported in BIND 8.
Faster ACL processing.
Efficient LRU cache-cleaning mechanism.
NSID support.

Update generated files for BIND 9.4.1

Switch from BIND 8 to BIND 9.

Submitted by: (in part) dougb@, trhodes@
Reviewed by: dougb@, trhodes@, re@
MFC after: 5 days