Add api to update lockout duration

Some live expeditions update a lockout's duration during progression

The current AddLockout method replaces lockout timers. This updates the
expiration of an existing lockout by modifying the original duration

Only members are updated and not the internal expedition timer by
default. This is so new members receive the original duration like live

common/servertalk.h

@@ -2055,6 +2055,7 @@ struct ServerExpeditionLockout_Struct {
 	uint32 sender_zone_id;
 	uint16 sender_instance_id;
 	uint8  remove;
+	uint8  members_only;
 	char   event_name[256];
 };