Just catching up :-(
One thing occurred to me - this document goes out of its way to say that
a proxy need not do the loop check unless it forks. In general that
makes sense, but in one case it does not:
Some proxies hide/suppress/obfuscate via headers, and then reverse the
process on responses. A proxy that does so breaks loop checking by any
of the proxies whose vias it hid. So I think a proxy that does this MUST
perform a loop check itself even if it does not fork.
Thanks,
Paul
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