Problem/Motivation
The poll project displays forms in a lazy builder. Apparently, that breaks big_pipe when submitting that form because it can't deal with the EnforcedResponseException that's then eventually thrown.
And we can't just handle it, because we already sent the response.. no way we can now suddenly send a difference one.
Proposed resolution
I think we can skip big_pipe on post requests?
The attached patch does that, but we'll need tests and needs to be properly documented, this is a just a quick fix.