HO: Implement load based handover, as handover_decision_2.c

Change-Id: Ie597eae82722baf32546331e443dd9d94f1f25e6
diff --git a/include/osmocom/bsc/handover_cfg.h b/include/osmocom/bsc/handover_cfg.h
index 55b9dbc..024bc97 100644
--- a/include/osmocom/bsc/handover_cfg.h
+++ b/include/osmocom/bsc/handover_cfg.h
@@ -10,6 +10,8 @@
  * the defaults from 'network' level are used implicitly, and changes take effect immediately. */
 struct handover_cfg;
 
+#define HO_CFG_CONGESTION_CHECK_DEFAULT 10
+
 struct handover_cfg *ho_cfg_init(void *ctx, struct handover_cfg *higher_level_cfg);
 
 #define HO_CFG_STR_HANDOVER1 "Handover options for handover decision algorithm 1\n"