- Removes the mixed tabs/spaces, replacing by standard 4 spaces indent.
 - Fix a bunch of bashisms.
 - Use shell syntax for and/or in if statements instead of the "test" syntax.
 - Improve block spacing a bit.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>