NetClient with SOCKS Proxy checks wrong hostname on upgradeToSsl()

[alexlehm]

When using a NetClient with SOCKS Proxy, the upgradeToSsl() checks the ssl cert against the name of the proxy, not the name of the target server.

I created a unit test that shows the issue by setting the proxy hostname to 127.0.0.1 and connecting to a server at localhost, this way it fails with "No subject alternative names matching IP address 127.0.0.1 found".

A unlikely usecase, however I got the error when trying to send a mail via smtp with starttls over TOR, which uses SOCKS5 to connect.

[alexlehm]

#1604