extension Makefile fragments, because they really don't have anything to
do with the buildlink[12] frameworks. Change all the Makefiles that use
application.buildlink.mk and extension.buildlink.mk to use application.mk
and extension.mk instead.
replace security/py-crypto (which isn't python-2.0-ready, and failed the
last dozen bulk builds for that reason).
Some help provided by Ty Sarna -- thanks!