- _ssl_interop_hint: also match ssl.SSLError instances (and one level of
__cause__/__context__) plus the bare UNEXPECTED_EOF marker, so an
SSLEOFError whose text httpx did not repeat still gets the hint. The
hint now names the TLS 1.2 diagnostic and links the providers docs
note instead of an issue number.
- tests: 3 -> 2 invariants (parametrized login_post/poll SSL case keeps
the raw text + hint + cause; a plain httpx timeout gets no hint).
- docs: providers.md Codex note carries the reporter's exact openssl.cnf
classic-groups snippet (EN + existing zh-Hans copy).
Refs #106384. The TLS max-version cap itself stays PR #44392's scope.
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