Function enable_keepalive

connect.c:761–767

}

static void enable_keepalive(int sockfd)
{
	int ka = 1;

	if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
		error_errno(_("unable to set SO_KEEPALIVE on socket"));
}

#ifndef NO_IPV6