MFH: r549731 r549732

Update to 9.11.23 & 9.16.7.

Changes: https://downloads.isc.org/isc/bind9/9.11.23/RELEASE-NOTES-bind-9.11.23.html
Changes: https://downloads.isc.org/isc/bind9/9.16.7/doc/arm/html/notes.html#notes-for-bind-9-16-7