A few days, we changed from PLIST_DB to PLIST_REPOSITORY, so that it looks a lot more like PACKAGE_REPOSITORY.
(specifically, having to figure out MACHINE_ARCH in one case and not in the other was turning to be a pain for some scripts and some installations). If you didn't even know about PLIST_DB, you will be fine. See bsd.port.mk(5) in current. PLIST_DB is still mostly supported, but it will go away eventually. If you had a PLIST_DB that didn't include an arch component, you *must* move your existing plist repository so that it includes an arch component. Otherwise, well, replace PLIST_DB=something/arch with PLIST_REPOSITORY=something in a place that matters. Very soon, proot will only support PLIST_REPOSITORY and the PLIST_DB support will go away.
