static char *mactcp_socket_error(Socket sock)
static const char *mactcp_socket_error(Socket sock)
static char *mactcp_socket_error(Socket sock){    static char buf[64];    Actual_Socket s = (Actual_Socket) sock;    switch (s->err) {      case noErr:	return NULL;      case insufficientResources:	return "Insufficient resources to open TCP stream";      case duplicateSocket:	return "Duplicate socket";      case openFailed:	return "Connection failed while opening";      default:	sprintf(buf, "Unknown MacTCP error %d", s->err);	return buf;    }}