use FileMailer instead of ProgMailer

obey INCLNULL flag in NIS maps

have getmxrr look at $=w to determine local host name

clean up handling of F line

give max message size in HELO/EHLO message if specified

fix misinterpretation of ctladdr when it goes through the queue;
this causes the setuid bit on files to be ignored

print more fields in printaddr

fix problem that can cause CNAMEs to be misinterpreted

debugging printf in mailfile

type char can be a problem in prototypes on some systems

add mci_options word & advertised max message size

patches to XLA code

HPUX compatibility changes in getla()

properly handle \! hack; improve error message printing; XLA
extensions; additional hooks for tempfail detection

change remotename to use flag bits instead of individual parameters;
add a pstat parameter to return status information up

pass flags to remotename() instead of many individual parameters

Extended Load Average (XLA) hooks

use -D_FORGIVING_CC_

oops... fix botch in previous delta

use UCB standard prototyping standard; use more prototypes

use UCB standard prototype string

use UCB standard for __P

add defines for prototype compatibility

avoid NULL mci_out syserr; creates bogus error messages

improve error printing (changes format of C line in qf)