throw in some "errno = 0;"'s to make syserr's more accurate;

throw in some "errno = 0;"'s to make syserr's more accurate;
take any -f flag if debug mode and uid==euid.

SCCS-vsn: usr.sbin/sendmail/src/deliver.c 3.47
SCCS-vsn: usr.sbin/sendmail/src/version.c 3.49
SCCS-vsn: usr.sbin/sendmail/src/main.c 3.41