Allow callling index time without authentication

[gaborbernat]

Seems this currently requires authentication, but I don't think is sensitive enough information to require it 🤔

[vladak]

Most likely not needed to be protected. Just like the /system/ping API endpoint, allowed in

opengrok/opengrok-web/src/main/java/org/opengrok/web/api/v1/filter/IncomingFilter.java

Lines 73 to 76 in e0faa57

	private static final Set<String> allowedPaths = new HashSet<>(Arrays.asList(
	SearchController.PATH, SuggesterController.PATH, SuggesterController.PATH + "/config",
	HistoryController.PATH, FileController.PATH, AnnotationController.PATH,
	SystemController.PATH + "/ping"));