This program runs an X server after sanity-checking the environment
and any options passed to it.  It is meant to enhance security on
multi-user systems running XFree86 4, where the ability to use a
startx script is needed.  If you have XFree86 3, do not install
this:  you do not need it and it will not work.  If you have no
untrusted users or always run the X server from xdm, you do not
need this.

Trevor Johnson
trevor@FreeBSD.org