The SOCKS proxy and relay.

* Srelay is a socks 4/5 protocol proxy server
* Supports socks connect/bind request in the protocol v4, v4a, and v5.
* Supports socks server chaining with both v4 and v5 servers.
* Supports Username/Password authentication in v5 (not recommended).
* Testing on Linux-x86_64, macos 10.7-10.12, FreeBSD 10.1-11.1
* Supports IPv6 as well as IPv4.
* Srelay is Free.