disallow_alias
int disallow_alias(struct node_host *, const char *);
if ($8 != NULL && disallow_alias($8, "invalid use of "
if ($13 != NULL && $13->host != NULL && disallow_alias(
disallow_alias(rs->host, "interface (%s) is not supported by pool type")))
disallow_alias(src_host, "invalid use of interface "