[development] optimize table in cron

[Bèr Kessels]

Hi
> There are some task that should/could be done automatically by drupal
> core itself. Besides OPTIMIZE TABLE it'd be nice to making backups
> (database mainly, but maybe files too?) and for PostgreSQL running VACUUM
> (http://www.postgresql.org/docs/current/static/maintenance.html)

IMO this is not something that must be built into core. In a contrib: fine, 
but certainly not in core. 
I for one, running a flock of sites on multisite want to maintain my backups / 
optimisations and that stuff in crontab. Having to circumvent built-in 
backups, that otherwise would break my server backup system would be a hell 
for me. 

A big -1 on having backup and optimisation stuff in core. A big +1 on putting 
that in contributed maintainance or database modules.

Ber