building FreeBSD release media (the installer) with pkgbase instead of installworld: https://reviews.freebsd.org/D54542
this is much faster, and also means you could build media from pkg.f.o without having to build src first, which is handy for building custom media.
and a few more changes in that stack to try to make this a bit more configurable and less finicky and error prone, since building the media has always been a bit of a hassle, especially if something goes wrong.
hopefully we can get all the release improvements for 16 in early enough that we're not left rushing to fix everything before release like we were with 15.
next: allowing the pkgbase installer to handle multiple kernel options, so we can provide both debug and non-debug GENERIC on the media…