Accept HTTP/1.0 response to CONNECT

[krant]

There are still proxies in a wild which respond HTTP/1.0 200 to CONNECT. With this PR Gun would support those proxies.

[essen]

Please be more specific. Which proxies?

[krant]

For example squidproxies.com still sells squid/3.1.23, you could check it with one of IP we bought from them:

curl -kvx 23.19.34.138:8800 https://httpbin.org/ip

(it will give you an error because of authentication, but HTTP/1.0 and squid version is there)

[essen]

Your curl command is something else. It's fine to return an HTTP/1.0 for a non-2xx response to a CONNECT request. Gun already handle those cases properly I believe.

It is the HTTP/1.0 2xx responses to CONNECT specifically that are in question here.

In any case I cannot think of a reason why this would create problems. On the other hand it would be good to add a comment explaining why we also accept HTTP/1.0 and that it is unlikely to cause problems because the tunnel takes over the entire connection.

Also one or more tests to confirm that the code behaves as intended.

[essen]

This has been fixed today. Closing, thanks!