method selection data may be irregular, incompatible with 3proxy

[ge9]

Hi, thank you for this great software.

I had a problem (connection is reset) in using proxifyre with SOCKS5 server 3proxy (https://3proxy.ru/), and I figured out that the problem lies in method selection.

Even when no password is specified, Proxifyre sends the following method selection data:

05 02 00 02

This means, 05 (SOCKS v5), 02 (two methods are available), 00 (first method: no auth), 02 (second method: password auth)
3proxy seems to prefer password auth than no auth (https://github.com/3proxy/3proxy/blob/29ef226b3cbdc2f1cefd8d6d54387bcd67a38384/src/socks.c#L63) and requests password, resulting in authentication failure and connection being reset.

Proxifyre still works with other SOCKS5 proxy that prefers no auth to password auth, but I guess Proxifyre is responsible for this problem.

Specifically, when no password is specified, Proxifyre should send the following method selection data:

05 01 00