[issue38216] Fix for issue30458 prevents crafting invalid requests

[Gregory P. Smith]

Gregory P. Smith <greg at krypto.org> added the comment:

All bug fixes are behavior changes.  Any broken behavior can be relied upon by someone.

So far the only ones who have popped up with this change as being a problem is one project's test suite where the behavior was used by a test because it was a convenient hack.  Not by application code.  Reverting mitigations due to the undesired behavior being convenient for someones protocol-abuse tests seems over cautious.  Those can be updated to not use our client library for their abuse scenarios.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38216>
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