Instead of always showing the tickets page

For client account / profile updates

Add client registration methods and login required checkbox

  * Administrator can disable the new activity alert
  * Administrator can disable automatic collaborators from email headers

Use `p:` in the database hostname specification, so `p:localhost` for
instance. This will help with SSL and remote database users.

References:
http://www.php.net/manual/en/mysqli.persistconns.php

It was also the last-modified date of the category -- not the actual FAQ
article itself

When checking ticket access - only consider assignment IF the ticket is
open. This is required since staff_id field is overloaded to show who closed
the ticket.

This can happen when associated department is private and the system has no
default department (which is possible with v1.6 upgrade)

The bug prevented attachments from being sent out if it was previously
attached to the ticket - for example, you could resend a file to end user.