socks: Fix destination host shown on SOCKS5 error #4394
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Prior to this change when a server returned a socks5 connect error then
curl would parse the destination address:port from that data and show it
to the user as the destination:
That's incorrect because the address:port included in the connect error
is actually a bind address:port (typically unused) and not the
destination address:port. This fix changes curl to show the destination
information that curl sent to the server instead:
Ref: https://tools.ietf.org/html/rfc1928#section-6
Closes #xxxx