Changes needed to build on NetBSD

A fellow NetBSD developer has sent me some changes needed to build 7.1
cleanly on NetBSD through its package system.  I am asking him a few
questions about it but I thought I would just commit them then if no one
has a problem.  They are mostly related to building cleanly on NetBSD.
Perhaps someone could watch source changes and just review the changes.
I am asking because I generally don't work on stuff outside of PyGreSQL.

-- 
D'Arcy J.M. Cain <darcy@{druid|vex}.net>   |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.