+/* Given a new ban ConfItem, look for any matching ban, update the lifetime
+ * from it and delete it.
+ */
+void
+replace_old_ban(struct ConfItem *aconf)
+{
+ rb_dlink_node *ptr;
+ struct ConfItem *oldconf;
+
+ ptr = find_prop_ban(aconf->status, aconf->user, aconf->host);
+ if(ptr != NULL)
+ {
+ oldconf = ptr->data;
+ /* Remember at least as long as the old one. */
+ if(oldconf->lifetime > aconf->lifetime)
+ aconf->lifetime = oldconf->lifetime;
+ /* Force creation time to increase. */
+ if(oldconf->created >= aconf->created)
+ aconf->created = oldconf->created + 1;
+ /* Leave at least one second of validity. */
+ if(aconf->hold <= aconf->created)
+ aconf->hold = aconf->created + 1;
+ if(aconf->lifetime < aconf->hold)
+ aconf->lifetime = aconf->hold;
+ /* Tell deactivate_conf() to destroy it. */
+ oldconf->lifetime = rb_current_time();
+ deactivate_conf(oldconf, ptr);
+ }
+}
+