mostly eliminate __FreeBSD__
fixed standalone daemon so it works.
build it as standalone by default, because that generally makes better sense.
(if there is disagreement, I will let it build both ways)
.if !exists(${PREFIX}/...), this is not a very clean solution but
the previous version simply didn't work because ${PREFIX} wouldn't
be substituted at this point.
xthread/xindex not enabled or tested.
Makefile will need revising after new bsd.port.mk
dependence on pre-configure target is broken, DEPENDS is a comment for now.
