#375 socks5 support

[Chris Vanden Berghe]

Hi,

Would it be possible to add support for socks5 proxies
complementing the already existent support for socks4
and socks4a?

In particular, the openssh client has support for
acting as a socks4 or socks5 proxy. When using this
functionality together with privoxy socks4 has to be
selected, and thus dns requests are leaked. By addings
support for socks5, this could be avoided.

Best regards,
Chris.

[John Rudd]

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I'd also like to see socks 5 support (and, again, for use with openssh)

[Fabian Keil]

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I'll take a look at this after the next stable release is out.

[Nobody/Anonymous]

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DNS is not leaked using the existing socks4A.

[Fabian Keil]

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SOCKS5 support is available in CVS now (and I'm
currently using it to close this request through Tor).

Not all features are supported yet (no authentication
for example), but it should be sufficient for OpenSSH
as well.

@nobody: last time I checked, SOCKS4A wasn't supported
by OpenSSH and given that SOCKS5 is superior it's unlikely
that this will change anytime soon.