Attempts to run usernet on a remote client fail.
Apparently it is not respecting the -display option that
all X applications are assumed to support.
I have two machines networked together, only one of which
has a modem and is configured to set up a ppp connection to
a remote ISP. IP Forwarding is currently disabled. Users
on the second machine use rsh to run internet applications
on the first machine. Works fine with everything except
you can use DISPLAY=foo.example.com:0 usernet to run it.
Could not replicate this problem on a test lab machine.