udbexpand.c => udb.c

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.

convert lockf implementation to use fcntl directly

allow udbexpand to return temporary failure errors

fix race condition in queue file locking; generalize getla

some System V hacks....

change lockf code to avoid race condition

fix lockf code; have getcanonname recognize canonical names

fix lockf code; have getcanonname recognize canonical names

give initialization a chance

allow for default UDB spec at compile time

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

include LOCKF compilation variable

F_TEST => F_TLOCK

oops.....

hacks for systems with lockf, not flock

set udb_dbname

fix misunderstanding of seq(R_CURSOR) semantics

substantial changes for user database package

don't complain if sendmail.fc doesn't exist (this is not an error)

from costales@icsi.Berkeley.EDU: print rulesets with symbolic name
instead of control characters; allow # comments in :include: files

from costales@icsi.Berkeley.EDU: print rulesets with symbolic name
instead of control characters; allow # comments in :include: files

don't assume getloadavg exists

more null pointer fixes

fix silly indirect-through-zero bug