huge number of changes for 8.2, including IRIX & Solaris portability;

huge number of changes for 8.2, including IRIX & Solaris portability;
improved error checking; fix -m flag and add -O flag in maps; fix long
DNS timeouts; relax safefile restrictions; add -X command line flag; etc.

SCCS-vsn: usr.sbin/sendmail/src/READ_ME 8.2
SCCS-vsn: usr.sbin/sendmail/src/usersmtp.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/stats.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/headers.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/recipient.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/main.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/envelope.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/conf.h 8.2
SCCS-vsn: usr.sbin/sendmail/src/parseaddr.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/err.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/sendmail.h 8.2
SCCS-vsn: usr.sbin/sendmail/src/savemail.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/srvrsmtp.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/util.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/deliver.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/queue.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/conf.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/alias.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/map.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/mci.c 8.2
SCCS-vsn: usr.sbin/sendmail/src/TRACEFLAGS 8.2