Enable e2fsck to use the tdb library for the inode count abstraction

If e2fsck.conf configures a scratch_files directory which is available,
and the number of directories exceeds scratch_files.numdirs_threshold,
then try to use the tdb library to store the inode count abstraction.
This allows us to check very large filesystems without needing as much
physical memory.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
4 files changed