Update the following files to make DEATH, OSSIFIED configurable qmail-clean.c, qmail-direct.c, qmail-dkim.c, qmail-multi.c, qmail-nullqueue.c, qmail-queue.c, qmail-send.c, qmail-spamfilter.c, qmta-send.c, slowq-send.c
Add compile time definition for DEATH, OSSIFIED in qmail.h
Updated the following man pages qmail-clean.9, qmail-direct.9, qmail-dkim.9, qmail-multi.9, qmail-nullqueue.8, qmail-queue.9, qmail-spamfilter.9, qmail-send.9, qmta-send.9, slowq-send.9, todo-proc.9