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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5)
Gecko/20031026 Firebird/0.7

Description of problem:
I know this it is against the relevant RFC to send a relative
redirect, however this is an exceptionally useful thing to have. I had
always assumed that RedirectSignal rewrote relative redirects, but
this error:

java.lang.IllegalStateException: The URL is relative and won't
dispatch correctly under some servlet containers; the URL is 'index.jsp'
	at com.arsdigita.util.Assert.assertTrue(Assert.java(Compiled Code))
	at com.arsdigita.web.RedirectSignal.(RedirectSignal.java:65)

seems to suggest that it didn't.

Given that this code used to work in practise, breaking it now seems a
little unhelpful.

RedirectSignal should trap relative URLs and rewrite them to be full
URLS based on the context of the current request. Otherwise this exact
code will have to be duplicated everywhere a relative redirect is desired.

As it stands this is a regression.

Version-Release number of selected component (if applicable):
Rickshaw