patch for squid error page vulnerability

[Robert Collins <robert.collins () ITDOMAIN COM AU>]

Note: This patch may not be the best way of doing things: the squid dev team
will have to look at that :]

This just address's the issue at hand, and will patch cleanly against the
current squid development HEAD from cvs. To patch an earlier squid you
may/will need to do so by hand.
Also some earlier squid's have a %u macro for the error pages as well as the
%U macro that this patch fixes. If you are patching an older squid check to
see if there is a %u and if so fix in the same way..

html.c goes in the lib directory of the squid souce tree. squiderror.diff
was generated from the root of the sourcetree with "diff -N -u"

Rob

Attachment: html.c
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Attachment: squiderror.diff
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