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Notice also that 'get' is replaced by 'thread.pl'.
What happens is that the thread script doesnt return
the document itself but returns a redirect as a Location
header line with the URL to fetch. Most browsers see that and automatically
fetch the new URL, and that URL is what gets displayed
to you.
We are thinking of changing this so that all the
thread commands are done by the get command too.
And then we could return the document *and* the new
URL using the URI header line. But most browsers dont
support this yet.
That's probably more than you wanted to know.
You can read even more about redirects at:
http://union.ncas.uiuc.edu/HyperNews/get/www/redirect.html
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We use redirects 
Changing the URL
(Roscoe)
