76ba46a85a
looking ${.OBJDIR} work that has the up-side of actually working
in upgrade and make -jN cases.
This needs to be revisited further, and it is conceivable that
the ${.OBJDIR} stuff can be simplified, but the sheer number of
edge cases and other causes make this Hard(tm). For now, this works.
This subtree is world-exportable, as it does not contain any cryptographic code. At the time of writing, it did not even contain source code, only Makefiles and headers. Please maintain this "exportable" status quo. Thanks! MarkM markm@freebsd.org 20th Sept 1997