This aligns the fix for large number of RRs in RRSet with 9.18 and up
by backporting to `max-records-per-type` configuration option to
BIND 9.16.
Merge branch 'ondrej/max-types-per-rr-backport-9.16' into 'bind-9.16'
See merge request isc-projects/bind9!9178
Resolves: RHEL-49900
