bind: Update to 9.11.0-P1

bind: Update to 9.11.0-P1

http://ftp.isc.org/isc/bind9/9.11.0-P1/RELEASE-NOTES-bind-9.11.0-P1.html:
"BIND 9.11.0-P1 addresses the security issue described in CVE-2016-8864"

https://access.redhat.com/security/cve/cve-2016-8864:
"A denial of service flaw was found in the way BIND handled responses
containing a DNAME answer. A remote attacker could use this flaw to
make named exit unexpectedly with an assertion failure via a specially
crafted DNS response."

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