fix(proxy): properly parse ipv6 when using socks local resolve

[seanmonstar]

Closes #637

[0f-0b]

Thank you for getting back so quickly. With this change applied, the SocksLocalResolve error no longer occurs, but the client is sending a request with address type 3 (domain name), while for an IPv6 address it should be 4.

00000000  05 01 00 05 01 00 03 14  5b 32 30 30 31 3a 34 38  |........[2001:48|
00000010  36 30 3a 34 38 36 30 3a  3a 36 34 5d 01 bb        |60:4860::64]..|
0000001e

For comparison, here is the request that curl sends.

00000000  05 02 00 01 05 01 00 04  20 01 48 60 48 60 00 00  |........ .H`H`..|
00000010  00 00 00 00 00 00 00 64  01 bb                    |.......d..|
0000001a