Allow "force-reinstall" drush option for "provision-install" command.

I'm including this patch in the next release of devshop.

It works!

Sorry about the bad patch. New branch pushed with just these changes.

About this...

+      // Load the current database name from drushrc.php.
+      // I cannot find another way to find the current db_name!
+      require_once(d()->site_path . '/drushrc.php');
+      $old_db_name = $options['db_name'];

I tried 6 ways from sunday to get the database name somehow. All null.

• global $databases;
• global $db_url;
• drush_get_option('db_name');

The problem is that the credentials aren't loaded until after drush validation hook, and when they are, they load a new database name.

We should really consider making it easier to figure out what database the site is using!

Ergonlogic was kind enough to point me to https://www.drupal.org/project/hosting_reinstall and https://www.drupal.org/project/hosting_dev.

I'm going to propose to put hosting_reinstall into hosting_tasks_extras in #2838431: Add Hosting Site Reinstall to hosting_tasks_extra

Actually I think this patch still has merit. I had problems with running the reinstall. This would be a simple backend, CLI API only addition, for now. Creating a UI for this is secondary.

See branch 2836185-force-reinstall

I'm still including this in devshop.

Fixed a problem when trying to re-run install tasks for sites that failed.

Merged.