bind-9.16: Use dns_name_copynf(...) for RUNTIME_CHECK(dns_name_copy(..., NULL))
This is bind9 upstream change c2dad0dcb2523a7711380e4409144745231b5282
Replace RUNTIME_CHECK(dns_name_copy(..., NULL)) with dns_name_copynf()
Use the semantic patch from the previous commit to replace all the calls to
dns_name_copy() with NULL as third argument with dns_name_copynf().