【备忘】curl --help|grep socks --socks4 HOST[:PORT] SOCKS4 proxy on given host + port --socks4a HOST[:PORT] SOCKS4a proxy on given host + port --socks5 HOST[:PORT] SOCKS5 proxy on given host + port --socks5-hostname HOST[:PORT] SOCKS5 proxy, pass host name to proxy(重点) --socks5-gssapi-service NAME SOCKS5 proxy service name for GSS-API --socks5-gssapi-nec Compatibility with NEC SOCKS5 server