turning on minor modes from hooks

[Dan Nicolaescu]

Now that local variables can be used to reliably turn on minor modes,
maybe it would be a good idea to turn on minor modes from hooks.

For example now one has to do this to turn on auto-file-mode in
text-mode:

(add-hook 'text-mode-hook   'turn-on-auto-fill)

instead of just:

(add-hook 'text-mode-hook   'auto-fill-mode)

This avoids defining extra functions just for the purpose of being able
to call them from hooks.

Not sure how feasible is to have a clean implementation of such a feature...

WDYT?