Deprecate and then remove dnssec-must-be-secure feature
The dnssec-must-be-secure feature was added in the early days of BIND 9 and DNSSEC and it makes sense only as a debugging feature. Remove it to simplify the code.
The dnssec-must-be-secure feature was added in the early days of BIND 9 and DNSSEC and it makes sense only as a debugging feature. Remove it to simplify the code.