prep 9.11.17

prep 9.11.17

Bumped the version file and added release line in CHANGES.

API files:
- lib/bind9/api:
  No changes because only changes in comments.
- lib/dns/api:
  Increment LIBINTERFACE because of the added field structure in
  dns_struct_update.
- lib/isc/api:
  Increment LIBINTERFACE because of the PKCS#11 replacement.
- lib/isccc/api:
  No changes because no source code changes.
- lib/isccfg/api:
  Increment LIBREVISION because of minor source code changes.
- lib/lwres/api:
  No changes because no source code changes.

I decided no changes to README.md or the release notes were necessary.

Perflab graphs look sane.