Rename keyring "access/revoke" to "unlock/lock".

The unlock/lock concept just seems easier to grasp and is used in
various similar tools as well.

headers/private/app/KeyStoreDefs.h

@@ -35,8 +35,8 @@ enum {
 	KEY_STORE_ADD_KEYRING_TO_MASTER			= 'KarM',
 	KEY_STORE_REMOVE_KEYRING_FROM_MASTER	= 'KrrM',
 	KEY_STORE_GET_NEXT_MASTER_KEYRING		= 'KnrM',
-	KEY_STORE_IS_KEYRING_ACCESSIBLE			= 'KiaR',
-	KEY_STORE_REVOKE_ACCESS					= 'KvaR',
+	KEY_STORE_IS_KEYRING_UNLOCKED			= 'KuKR',
+	KEY_STORE_LOCK_KEYRING					= 'KlKR',
 	KEY_STORE_GET_NEXT_APPLICATION			= 'KnKA',
 	KEY_STORE_REMOVE_APPLICATION			= 'KrKA',
 };