do recursive evaluation of CNAMEs

include declaration for errstring -- HPUX seems to need it

fix HELO problem in srvrsmtp (HELO was required); fall back to
other MX records if error occurs on MAIL or DATA; prototype portability;
change $~ to just match one word; fix some problems with multi-

fix HELO problem in srvrsmtp (HELO was required); fall back to
other MX records if error occurs on MAIL or DATA; prototype portability;
change $~ to just match one word; fix some problems with multi-word matches

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simplify content of X-Authentication-Warning: header

make MATCHZERO a synonym for CANONHOST (to clarify code)

MATCHZERO doesn't assign a $N value

fix excessive matching problem

portability

fix a few problems pointed out by Neil Rickert; $~ matches only
one token

fix problem with prototype mismatches

more fixes on __STDC__ declarations

prototypes break a lot of compilers, even with __STDC__ test

fix auth_warning problem that rejected all MAIL commands if no
HELO was given

try to fall back to MX sites if there is a failure anywhere
in delivery (not just in connection establishment)

define $=w to include long host name

implement multi-word classes

add authentication warnings; improved multi network support; fix a
couple of bugs causing core dumps; get new transcript when splitting
envelope; add dequote map class support; debugging additions; a

add authentication warnings; improved multi network support; fix a
couple of bugs causing core dumps; get new transcript when splitting
envelope; add dequote map class support; debugging additions; allow
addition of new Comments: headers

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recognize -a flag in dequote map

fix some minor glitches

improve error reporting; open new transcript on envelope cloning

add dequote pseudo-map

catch "unable to create locked temp file" condition

clean up logging of email received from localhost

improved debugging; pass convtime a default units; allow addition
of Comments: and stripping of Return-Path:

add X-Authentication-Warning: headers on possible attempts at forgery