Uses Windows dir stream to make dir listing faster.
Merge branch 'master' into dirstream
Ensures to call lstat_ex() only on regular files.
Fixes the use of star in the regression test.
Adds the --test-force-scan-winfind option to use the legacy dir listing.
Reads the physical offset only for new files.
In Windows ensures to use synced information for new files.

Keeps track of the sync state of info with a new st_sync field
in the stat struct.
Merge branch 'dirstream'
Removes now unnecessary Mapping message.