BUG FIXES
=========
2 possible references to out of scoped vars,
one off-by-one buffer,
a test function had obsolete syntax,
several memory leaks on error bail-out.

LOG CHANGES
===========
Changed the log "DNS: timeout server[0]:
127.0.0.1" to also report the domain.

BEHAVIOR
========
Harden checkhelo_if_no_auth in an attempt
to reject blatant DKIM-replay spam.
