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/os/app/KeyStore.h

@@ -71,11 +71,11 @@ public:
 			status_t			GetNextMasterKeyring(uint32& cookie,
 									BString& keyring);
 
-			// Access
+			// Locking
 
-			bool				IsKeyringAccessible(const char* keyring);
-			status_t			RevokeAccess(const char* keyring);
-			status_t			RevokeMasterAccess();
+			bool				IsKeyringUnlocked(const char* keyring);
+			status_t			LockKeyring(const char* keyring);
+			status_t			LockMasterKeyring();
 
 			// Applications
 

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',
 };