Add/remove servers from secgroups
diff --git a/openstack/compute/v2/extensions/secgroups/urls.go b/openstack/compute/v2/extensions/secgroups/urls.go
index 7e2694c..f4760b6 100644
--- a/openstack/compute/v2/extensions/secgroups/urls.go
+++ b/openstack/compute/v2/extensions/secgroups/urls.go
@@ -26,3 +26,7 @@
 func resourceRuleURL(c *gophercloud.ServiceClient, id string) string {
 	return c.ServiceURL(rulepath, id)
 }
+
+func serverActionURL(c *gophercloud.ServiceClient, id string) string {
+	return c.ServiceURL("servers", id, "action")
+}