When it answers as HTTP/1.0, so that clients (hyper) knows properly that
the connection remains intact.
<connect1001>
HTTP/1.0 407 Authorization Required to proxy me my dear\r
Proxy-Authenticate: NTLM TlRMTVNTUAACAAAAAgACADAAAACGggEAc51AYVDgyNcAAAAAAAAAAG4AbgAyAAAAQ0MCAAQAQwBDAAEAEgBFAEwASQBTAEEAQgBFAFQASAAEABgAYwBjAC4AaQBjAGUAZABlAHYALgBuAHUAAwAsAGUAbABpAHMAYQBiAGUAdABoAC4AYwBjAC4AaQBjAGUAZABlAHYALgBuAHUAAAAAAA==\r
+Connection: Keep-Alive\r
Content-Length: 1033\r
\r
And you should ignore this data.
<datacheck>
HTTP/1.0 407 Authorization Required to proxy me my dear\r
Proxy-Authenticate: NTLM TlRMTVNTUAACAAAAAgACADAAAACGggEAc51AYVDgyNcAAAAAAAAAAG4AbgAyAAAAQ0MCAAQAQwBDAAEAEgBFAEwASQBTAEEAQgBFAFQASAAEABgAYwBjAC4AaQBjAGUAZABlAHYALgBuAHUAAwAsAGUAbABpAHMAYQBiAGUAdABoAC4AYwBjAC4AaQBjAGUAZABlAHYALgBuAHUAAAAAAA==\r
+Connection: Keep-Alive\r
Content-Length: 1033\r
\r
HTTP/1.1 200 Things are fine in proxy land\r