docs: filesystems: convert autofs.txt to reST

Convert autofs.txt to reST.

The following changes abound:

- Introduce reST formatting for headings, lists et al.
- Add an indentation of an 8 space tab wherever suitable, so as
  to maintain consistency.
- Remove indentation of the description of the ioctls which are similar
  to the AUTOFS_IOC ioctls, as it does not come out quite right in HTML.
- Add an entry for autofs in the index.

Signed-off-by: Jaskaran Singh <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>

0 files changed, 0 insertions, 0 deletions