Eventlet

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* [fix] fix the monkey patching with the asyncio hub
* [feature] introduce the unmonkeypatching feature

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* [fix] Python 3.13: Use greenthread's dead state where possible (1000)
* [env] bump github Actions (996)
* [fix] Fix bug where asyncio hub didn't support multiple os threads (995)

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* Python 3.13 Support (988)
* [fix] wsgi: server MUST NOT send Content-Length/Transfer-Encoding header in response with a status code of 1xx, 204 or (2xx to CONNECT request) (747)
* [fix] wsgi: No request Content-Length nor Transfer-Encoding implies no body (985)

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* [fix] os.read/write waits until file descriptor is ready. https://github.com/eventlet/eventlet/pull/975
* [fix] Upgrade RLocks as last thing we do https://github.com/eventlet/eventlet/pull/970
* [security] drop header keys with underscores https://github.com/eventlet/eventlet/pull/959
* [doc] Various doc updates (Migration Guide, repair links, warns...)

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* [fix] eventlet.websocket is not always used from eventlet.wsgi, so do not assume eventlet.set_idle exists https://github.com/eventlet/eventlet/pull/949

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* [fix] Make sure asyncio hub doesn't use greendns for asyncio DNS APIs https://github.com/eventlet/eventlet/pull/938
* [fix] Make asyncio.to_thread work with the same semantics as normal asyncio https://github.com/eventlet/eventlet/pull/930
* [fix] Refactor congruence checks based on assert at runtime https://github.com/eventlet/eventlet/pull/932
* [tests] Run tests on macOS in CI, and some fixes to get it in reasonable state (list https://github.com/eventlet/eventlet/pull/934
* [fix] Fix wsgi.server shutdown for in-flight requests https://github.com/eventlet/eventlet/pull/912
* [feature] Add debug convenience helpers - asyncio, threads https://github.com/eventlet/eventlet/pull/925
* [fix] Handle errors better. https://github.com/eventlet/eventlet/pull/923