let crond and crontab share defines

[Bernhard Fischer]

On Thu, Jun 21, 2007 at 03:32:13PM +0200, walter harms wrote:
>hi list,
>some time ago i changed the crontab file location. I got confused because
>crontab -e could not find that file. this patch moves the defines into a separate
>header that can be stored in miscutils, please apply.

Why not put it into libbb/messages.c like the other commonly used
pathes?
>
>re,
> wh
>
>ps: the next step is to make it changeable from kconfig