Please review/comment on the cron editor in the configuration page

[Maria Odea Ching]

Hi Everyone,

I updated the cron editor in the index configuration page of the archiva 
webapp. I committed the proposed format in the
archiva white site and a staging site is avaliable at 
http://people.apache.org/~oching/archiva-white-site/admin/config.html 
<http://people.apache.org/%7Eoching/archiva-white-site/admin/config.html>.

Any comments are welcome :)

Thanks,
Odea