set_session_id method is missing a word in its name

The correct method name should be set_session_id_context, since it is a wrapper around https://www.openssl.org/docs/man1.1.0/man3/SSL_CTX_set_session_id_context.html. Somewhat understandably the original implementation probably thought "context" was just a redundant-for-no-reason copy of "CTX", but the "session ID context" is legitimately a completely different thing from the "session ID" (which you set on the session object, with https://www.openssl.org/docs/man1.1.0/man3/SSL_SESSION_get_id.html, something that pyOpenSSL doesn't currently expose any methods on).

Start at the wrapper entry point for the existing set_session_id method and compare it with OpenSSL's SSL_CTX_set_session_id_context documentation. Rename the exposed method to set_session_id_context and check references to the old name; done means the wrapper's name matches the documented OpenSSL operation.