Additional context, six hours ago (MFC after three days):
packages: Add meta-package sets ยท freebsd/freebsd-src@66f36c3 <https://github.com/freebsd/freebsd-src/commit/66f36c368676>
No mention of vital in the commit, there's a mention under <https://reviews.freebsd.org/D52412#1197084>.
