easy:SetOpt_Socks5_GSSAPI_NEC -- set socks proxy gssapi negotiation protection
Pass a value set to 1 to enable or 0 to disable. As part of the gssapi
negotiation a protection mode is negotiated. The RFC1961 says in section
4.3/4.4 it should be protected, but the NEC reference implementation does not.
If enabled, this option allows the unprotected exchange of the protection mode