Add B_KEY_PURPOSE_KEYRING for keyring keys.

headers/os/app/Key.h

@@ -15,6 +15,7 @@
 enum BKeyPurpose {
 	B_KEY_PURPOSE_ANY,
 	B_KEY_PURPOSE_GENERIC,
+	B_KEY_PURPOSE_KEYRING,
 	B_KEY_PURPOSE_WEB,
 	B_KEY_PURPOSE_NETWORK,
 	B_KEY_PURPOSE_VOLUME

src/kits/app/Key.cpp

@@ -214,6 +214,9 @@ BKey::PrintToStream()
 		case B_KEY_PURPOSE_GENERIC:
 			purposeString = "generic";
 			break;
+		case B_KEY_PURPOSE_KEYRING:
+			purposeString = "keyring";
+			break;
 		case B_KEY_PURPOSE_WEB:
 			purposeString = "web";
 			break;