prototype functions

prototype functions

SCCS-vsn: usr.sbin/sendmail/src/usersmtp.c 6.32
SCCS-vsn: usr.sbin/sendmail/src/headers.c 6.35
SCCS-vsn: usr.sbin/sendmail/src/recipient.c 6.41
SCCS-vsn: usr.sbin/sendmail/src/macro.c 6.8
SCCS-vsn: usr.sbin/sendmail/src/main.c 6.67
SCCS-vsn: usr.sbin/sendmail/src/envelope.c 6.35
SCCS-vsn: usr.sbin/sendmail/src/parseaddr.c 6.57
SCCS-vsn: usr.sbin/sendmail/src/collect.c 6.17
SCCS-vsn: usr.sbin/sendmail/src/sendmail.h 6.67
SCCS-vsn: usr.sbin/sendmail/src/savemail.c 6.44
SCCS-vsn: usr.sbin/sendmail/src/daemon.c 6.52
SCCS-vsn: usr.sbin/sendmail/src/srvrsmtp.c 6.56
SCCS-vsn: usr.sbin/sendmail/src/util.c 6.19
SCCS-vsn: usr.sbin/sendmail/src/readcf.c 6.40
SCCS-vsn: usr.sbin/sendmail/src/deliver.c 6.79
SCCS-vsn: usr.sbin/sendmail/src/queue.c 6.58
SCCS-vsn: usr.sbin/sendmail/src/alias.c 6.49
SCCS-vsn: usr.sbin/sendmail/src/udb.c 6.21