allow both NEWDB and DBM compilation so that old alias files will
be accepted

delete remote implementation in lieu of better protocol

change leading "local mailer" indicator to avoid conflict with
:include: lists

sin_len is non-compatible (but not required)

__hostalias is a front end issue, not a back end issue

handle backslashes in addresses properly

handle a wider range of syntaxes in crackaddr -- notably, angle
brackets appearing in quotes and comments.

handle a wider range of syntaxes -- notably, angle brackets
appearing in quotes and comments.

beginnings of implementation of options on UDB specifications

make it work with udbd server

fixes for user database and new config files

have DNS return what matched on a T_CNAME query

allow catching of local names after aliasing but before local name
resolution; have name server return indication that it matched.

add definitions for config level 2

return indication of whether nameserver found a match

return indication of whether nameserver found a match

if config level >=2, don't reset RES_DEFNAMES|RES_DNSRCH

add "config level" config parameter

some changes to enhance compatibility with SunOS sendmail

when initializing the $=w class, make sure it is only one word --
otherwise it will never match

check to see if hostname has changed in thaw(); if it has, ignore
the frozen config (with the wrong hostname)

reverse sense of w (wildcard MX) flag to default to the safest option,
instead of the most desirable option.

fix some debugging output

hash_open -> dbopen

hash_open -> dbopen, R_PUT no longer necessary