Drop HTTP proxy support, upgrade Websockets to 10.0
HTTP proxies were never used, and since support for them had to be patched into the Websockets library, it had to be kept at version 8 which didn’t support Python 3.10.
HTTP proxies were never used, and since support for them had to be patched into the Websockets library, it had to be kept at version 8 which didn’t support Python 3.10.