[E-Lang] Bug Report: No longer installs headless

[Mark S. Miller]

Up through 0.8.9k, if you were installing E on a Linux box over a telnet 
session, it would detect that it was running headless, and just use stdout 
to give you feedback (really, just letting you know at the end that the 
install worked), rather than die trying to bring up a swing button in a 
telnet session.

In 0.8.9p & the soon-to-be-announced 0.8.9s simply fail to install in this 
situation.  I will fix this somehow, as I know of several kludgy ways to 
detect if I'm headless, but is there a good conventional way to do so from 
Java?

        Cheers,
        --MarkM