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* green.thread: unlocked Lock().release() should raise exception, returned True https://github.com/eventlet/eventlet/issues/697
* wsgi: Don't break HTTP framing during 100-continue handling https://github.com/eventlet/eventlet/pull/578
* Python 3.10 partial support https://github.com/eventlet/eventlet/pull/715
* greendns: Create a DNS resolver lazily rather than on import https://github.com/eventlet/eventlet/issues/462
* ssl: GreenSSLContext minimum_version and maximum_version setters https://github.com/eventlet/eventlet/issues/726