//sys WSACleanup() (errno int) [failretval==-1] = wsock32.WSACleanup
//sys WSAIoctl(s Handle, iocc uint32, inbuf *byte, cbif uint32, outbuf *byte, cbob uint32, cbbr *uint32, overlapped *Overlapped, completionRoutine uintptr) (errno int) [failretval==-1] = ws2_32.WSAIoctl
//sys socket(af int32, typ int32, protocol int32) (handle Handle, errno int) [failretval==InvalidHandle] = wsock32.socket
-//sys setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (errno int) [failretval==-1] = wsock32.setsockopt
+//sys Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (errno int) [failretval==-1] = wsock32.setsockopt
//sys bind(s Handle, name uintptr, namelen int32) (errno int) [failretval==-1] = wsock32.bind
//sys connect(s Handle, name uintptr, namelen int32) (errno int) [failretval==-1] = wsock32.connect
//sys getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (errno int) [failretval==-1] = wsock32.getsockname