bind: Update to 9.11.25

bind: Update to 9.11.25

For details (v9.16.22-v9.16.25) see:
https://downloads.isc.org/isc/bind9/9.16.25/doc/arm/html/notes.html#notes-for-bind-9-16-25

"Notes for BIND 9.16.25
Feature Changes

    Overall memory use by named has been optimized and reduced,
    especially on systems with many CPU cores. The default memory
    allocator has been switched from internal to external. A new
    command-line option -M internal allows named to be started with the
    old internal memory allocator. [GL #2398]

Bug Fixes

    On FreeBSD, TCP connections leaked a small amount of heap memory,
    leading to an eventual out-of-memory problem. This has been fixed.
    [GL #3051]

    If signatures created by the ZSK were expired and the ZSK private
    key was offline, the signatures were not replaced. This behavior has
    been amended to replace the expired signatures with new signatures
    created using the KSK. [GL #3049]

    Under certain circumstances, the signed version of an inline-signed
    zone could be dumped to disk without the serial number of the
    unsigned version of the zone. This prevented resynchronization
    of the zone contents after named restarted, if the unsigned zone
    file was modified while named was not running. This has been fixed.
    [GL #3071]
...
"

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Adolf Belka <adolf.belka@ipfire.org>