format: Use @%li for object positions

- @%li for object positions
- obj_pos_of where possible
- @%-10li for object formatted positions
- tune up parse_sections printing

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
files: Show fd pos in debug print

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>