Support an "any" IKE version for both IKEv1 or IKEv2

src/stroke/stroke.c

@@ -138,7 +138,7 @@ static int add_connection(char *name,
 	msg.type = STR_ADD_CONN;
 
 	msg.add_conn.name = push_string(&msg, name);
-	msg.add_conn.ikev2 = 1;
+	msg.add_conn.version = 2;
 	msg.add_conn.auth_method = 2;
 	msg.add_conn.mode = 1;
 	msg.add_conn.mobike = 1;

src/stroke/stroke_msg.h

@@ -239,7 +239,7 @@ struct stroke_msg_t {
 		/* data for STR_ADD_CONN */
 		struct {
 			char *name;
-			int ikev2;
+			int version;
 			/* next three are deprecated, use stroke_end_t.auth instead */
 			int auth_method;
 			u_int32_t eap_type;