Drill is a tool ala dig from BIND. It was designed with DNSSEC in mind and should be a useful debugging/query tool for DNSSEC. A lot of DNS debugging is done with dig, but as dig is made with the same libraries as BIND8/9 (the most used DNS server out there), what are you actually debugging/testing? Drill has nothing in common with either NSD nor BIND. During the development process we are actually uncovering obscure bugs in NSD and BIND (and in drill itself).
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.