Also allow an administrator to lift the force password change flag without
specifying a new password.

Conflicts:
	include/class.client.php
	include/class.usersession.php

auth: Ensure session token is cleared on logout

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

Parse Microsoft TNEF email attachments

Peter Rotich <peter@osticket.com>

Shift error checking into Mail_Parse::parseAddressList

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

Add ability to audit failed logins attempts

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

Separate authentication strike (excessive login attempts) count from timeout
enforcement.

Conflicts:
	include/class.forms.php

Remove delivered-to addresses from list of recipients

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

Assume ISO-8859-1 when charset is unknown or bogus

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

Unfortunately, this is necessary because some mail clients send in content without defining
the charset or at worse using freaking wrong/invalid charsets like
'default'!

Simplify workflow for new ticket by staff

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

forms: Allow searching any priority

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

If the system has only one help topic automatically select the help topic
and display any associated custom form.

Priority field and custom list fields have a prompt value (shows up only for
drop-down widget). And the short and long answer fields have a placeholder
configuration item.

Ignore case for ticket variables on custom fields

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

This is necessary so we don't add delivered-to addresses to the list of
addressee/collaborators.

Only add collaborators if the system email in the To and Cc list was determined

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

necessary to avoid adding internal virtual address as a collaborator.

Store delivered-to email ID - giving us the ability to reply FROM specific
email address as opposed to the department's email.

Conflicts:
	include/class.mailparse.php

Search for system emails in To and Delivered-To

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

Conflicts:
	include/class.mailparse.php

This is needed to help us remove invalid characters set by some mail
clients.

Previously, the Delivered-To header was only used if the To header was not
found