This patch partially reverts the previous database migration patch which
added a primary key to the table on the `thread_id` column. This column
cannot be used, because there may be multiple entries for thread_id = 0.

This also allows ticket_collaborator.isactive to be negative, as well as
adds the database portion of regex support for ticket filters.

Conflicts:
	include/api.tickets.php
	include/class.client.php
	include/class.mailfetch.php
	include/class.thread.php
	open.php

Handle email bounce notifications

Reviewed-By: Peter Rotich <peter@osticket.com>

Timeout after max timeout while fetching emails

Reviewed-By: Jared Hancock <jared@osticket.com>
Reviewed-By: Alan Wilkes

Delete junk records from the %ticket_email_info table before adding a
primary key. Since there was previously no PK, there could be duplicate
records.

Hide close/hide dialog when esc key is pressed fixes issue #441

Reviewed-By: Jared Hancock <jared@osticket.com>

forms: Fix ticket submission if already logged in

Reviewed-By: Peter Rotich <peter@osticket.com>

If a client is already logged into the client portal and attempts to submit
a new ticket, the ticket will be rejected if the contact-information form
has a required field other than `name` and `email`.

This patch fixes `class Client` so that the user-id is fetched from the
database and made available via the `::getUserId()` method. This was already
corrected in the `develop-next` branch for v1.8.1. The `uid` field is passed
into `Ticket::create()` so the user form validation is bypassed.

This commit should be ignored when merged into the 1.8.1 codebase.

Processing fetching in ASC order of the last fetch time
Remove LIMIT of 10 emails per fetch
Flush the buffer and terminate the request cleanly on autocron

Conflicts:
	include/staff/tickets.inc.php

This allows the email system to detect something like a bounce mail and
specify that the associated message should be an internal note.

Previously, the mail parsing and fetching system would recurse unbounded
searching for bodies by content-type

If a custom list item were added to an email template, and there is no data
for the field (ie. the field is not required) when the template is rendered,
the system would crash.

toString() is required to return a string, no matter what. This patch
cascades the (string) coercion to the current value of the list field if it
is not an instance of a DynamicListItem

Don't send out SQL error on upgrade to 1.8.1

Reviewed-By: Peter Rotich <peter@osticket.com>

Fix display of priority field in queue export

Reviewed-By: Peter Rotich <peter@osticket.com>

Also removes the fetching of priorities separately and addresses sorting of
priorities by the ID field rather than the urgency field.

oops: Fixup deploy for 1.8.1 and onward

Reviewed-By: Peter Rotich <peter@osticket.com>

Fixup querying drop-down lists via advanced search

Reviewed-By: Peter Rotich <peter@osticket.com>

It turns out that the _id field was not added to the cdata table when it was
created for SelectionField items, because the ::hasIdValue() method was not
implemented. This patch correctly searches SelectionFields via advanced
search.

Several small edits to initial email templates

Reviewed-By: Peter Rotich <peter@osticket.com>

Add CLI app for file management

Reviewed-By: Peter Rotich <peter@osticket.com>

Add the current backend to the list results output
Add a --limit switch to support limit results sent to a command like
`migrate`