OS-3332 getaddrinfo mistakingly IPv6 maps addresses
Reviewed by: Joshua M. Clulow <josh@sysmgr.org>
OS-2727 psignal and psiginfo don't handle NULL arguments correctly
OS-2728 psignal(3C) header file could be <signal.h>
Reviewed by: Joshua M. Clulow <josh@sysmgr.org>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>