policy: allow disabling load balancing

Load-balancing only makes sense where multiple APs are deployed in the
same area. Enabling load-balancing between APs in different rooms might
steer clients to APs with a much lower signal strength, resulting in
lower data rates and inefficient use of airtime.

Allow disabling load balancing by setting the threshold to 0.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: David Bauer <mail@david-bauer.net>

policy.c

@@ -29,6 +29,9 @@ below_assoc_threshold(struct usteer_node *node_cur, struct usteer_node *node_new
 	bool ref_5g = node_cur->freq > 4000;
 	bool node_5g = node_new->freq > 4000;
 
+	if (!config.load_balancing_threshold)
+		return false;
+
 	if (ref_5g && !node_5g)
 		n_assoc_new += config.band_steering_threshold;
 	else if (!ref_5g && node_5g)