Approved - minor edits later.

Change href definitions for embedded links in the ticket thread so that the
click will be bounced through a script. This will hide the original referrer
URL where the link originated.

Reviewed: .htaccess for mod_rewrite

The API is implemented for HTTP requests via the api/http.php module.  Where
supported (by Apache), support rewriting URIs from something like
http://domain.tld/api/tickets.xml to
http://domain.tld/api/http.php/tickets.xml, so the explicit usage of the
http.php script is not required.

Review - Add deleteOrphans() utility to the File class to remove unused files

* Thanks for the fix.

Review - Reject tickets from banned emails. 

*Looks good 

Also add a cron job to perform the task on demand
Change the implementation for Ticket::deleteAttachments to call this method
after simply removing all entries from the %ticket_attachment table

This will include other information described in email filters that mark the
email as rejected. For instance, sender-name, message body content, etc. It
also allows for other matching methods (contains, !=, !contains), rather
than the quick banlist method from EmailFilter::isBanned().

Also fix bug in Filter::__construct that prevented any filter from ever
matching