run as the user forwarding mail after a .forward operation;

run as the user forwarding mail after a .forward operation;
fix a bug in .forwarding that caused recursive expansion;
restrict mail to programs, files, and with :include: for security
reasons.

SCCS-vsn: usr.sbin/sendmail/src/alias.c 3.22
SCCS-vsn: usr.sbin/sendmail/src/deliver.c 3.39
SCCS-vsn: usr.sbin/sendmail/src/sendmail.h 3.42
SCCS-vsn: usr.sbin/sendmail/src/savemail.c 3.18
SCCS-vsn: usr.sbin/sendmail/src/version.c 3.29
SCCS-vsn: usr.sbin/sendmail/src/main.c 3.37
SCCS-vsn: usr.sbin/sendmail/src/headers.c 3.8
SCCS-vsn: usr.sbin/sendmail/src/recipient.c 3.17