Installation: may require cpanel to create database #1045

On shared hosting, the db user typically won't have create database privilege.

If database creation fails, we can offer to use the cpanel xml api.

We can try to auto-detect cpanel. Hints that cpanel may be present:

• /usr/bin/spamassassin-cpanel
• /etc/cpanel_exim_system_filter
• $HOME/.cpanel/ e.g., dirname($_SERVER['DOCUMENT_ROOT']) . '/.cpanel'

Note: be mindful of possible open basedir restrictions.

I think if users have cpanel, it is generally easy for them to create the DB anyway. I would say wont fix except if you feel like this is an issue for many users.

This made a mess of databaseSetup() in Installation/Controller.php. (Deeply-nested try...catch blocks.)

Deferring...