break out special local mail processing (e.g., mapping to the

break out special local mail processing (e.g., mapping to the
"prog" mailer) onto separate mailer flags

SCCS-vsn: usr.sbin/sendmail/src/usersmtp.c 8.20
SCCS-vsn: usr.sbin/sendmail/src/headers.c 8.33
SCCS-vsn: usr.sbin/sendmail/src/recipient.c 8.46
SCCS-vsn: usr.sbin/sendmail/src/main.c 8.62
SCCS-vsn: usr.sbin/sendmail/src/envelope.c 8.36
SCCS-vsn: usr.sbin/sendmail/src/parseaddr.c 8.34
SCCS-vsn: usr.sbin/sendmail/src/collect.c 8.16
SCCS-vsn: usr.sbin/sendmail/src/sendmail.h 8.45
SCCS-vsn: usr.sbin/sendmail/src/savemail.c 8.32
SCCS-vsn: usr.sbin/sendmail/src/TODO 8.24
SCCS-vsn: usr.sbin/sendmail/src/srvrsmtp.c 8.42
SCCS-vsn: usr.sbin/sendmail/src/deliver.c 8.87
SCCS-vsn: usr.sbin/sendmail/src/conf.c 8.97
SCCS-vsn: usr.sbin/sendmail/src/alias.c 8.29