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a4b39d2015
In the socket system, only WebSocket sockets are allowed to tunnel through HTTP/1 proxies. "Raw" sockets in the normal socket pool don't have it, and their CONNECT headers are not sent, instead the raw payload is sent as-is to the HTTP/1 proxy, breaking the proxying. The socket system works like this: - HTTP sockets via HTTP/1 proxies: normal pool, no tunneling. - HTTPS sockets via HTTP/1 proxies: normal pool, no tunneling, but does its own proxy encapsulation. - WS sockets via HTTP/1 proxies: WS pool, tunneling. In Naive, we need the normal pool because the WS pool has some extra restrictions but we also need tunneling to produce a client socket with proxy tunneling built in. Therefore force tunneling for all sockets and have them always send CONNECT headers. This will otherwise break regular HTTP client sockets via HTTP/1 proxies, but as we don't use this combination, it is ok.