allow F config line to open a pipe

add -R flag to log incoming raw recipients for analysis

separate support for header vs envelope sender; if users are in the
database, map them to a canonical name (e.g., @CS.Berkeley.EDU) in header.

allow udbexpand to return temporary failure errors

fix race condition in queue file locking; generalize getla

fix lockf code; have getcanonname recognize canonical names

define $m macro to have the domain part of $w

substantial changes for user database package

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

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.

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.

use new Berkeley DB routines for aliases

hooks for distributed user database system

some compatibility with SunOS for future work here at Berkeley;
change NO_WILDCARD_MX compilation flag to configuration option "w".

fix botch in file locking when checkpoints kick in

fix read-only string problem in help command

k option specifies checkpoint interval (default 10);
qf file is rewritten after k successful deliveries.
(ref bug 4.3BSD-reno/usr.bin/10)

from Eric Wassenaar at NIKHEF-H, Amsterdam: reset EF_OLDSTYLE bit when
returning mail

new copyright notice

don't change semantics of uid setting for local mail delivery; this
would require a .cf file change