TrackerMinerFS: Improve checks on whether a file/dir should be indexed.
TrackerMinerFS: Improve checks on whether a file/dir should be indexed.

For events coming from the monitor, we just call check-file/directory, since
the mtime has changed for sure. For crawling, tell the crawler to inspect all
directories, but mark these which mtime hasn't changed so they can be ignored
before being added to the processing queue.

outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker