explicitly set the user and group IDs to non-priveleged values. This
was done because the chroot() call used when the secure (-s) option is
used can only be done by the superuser.
This change now requires tftpd to be executed by root. So the
inetd.conf entry has been changed to start it that way. I also
added -s /tftpboot arguments, so people who uncomment the tftpd
entry without realizing it's security ramifications won't open
thier whole systems to unauthorized access.
