bind: Update to 9.11.0-P2

bind: Update to 9.11.0-P2

For details see:
https://ftp.isc.org/isc/bind9/9.11.0-P2/RELEASE-NOTES-bind-9.11.0-P2.html

"BIND 9.11.0-P2 addresses the security issues described in CVE-2016-9131, CVE-2016-9147,
CVE-2016-9444 and CVE-2016-9778.

...

Security Fixes

A coding error in the nxdomain-redirect feature could lead to an assertion failure if the
redirection namespace was served from a local authoritative data source such as a local zone
or a DLZ instead of via recursive lookup. This flaw is disclosed in CVE-2016-9778. [RT

Named could mishandle authority sections that were missing RRSIGs triggering an assertion
failure. This flaw is disclosed in CVE-2016-9444. [RT # 43632]

Named mishandled some responses where covering RRSIG records are returned without the
requested data resulting in a assertion failure. This flaw is disclosed in CVE-2016-9147.
[RT #43548]

Named incorrectly tried to cache TKEY records which could trigger a assertion failure when
there was a class mismatch. This flaw is disclosed in CVE-2016-9131. [RT #43522]

It was possible to trigger assertions when processing a response. This flaw is disclosed in
CVE-2016-8864. [RT #43465]"

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>