Handle cases where email headers contain unicode or high-ascii characters
and are not encoded according to RFC-2047. This patch handles a special case
where a detectable unicode character set is used, such as UTF-8. For
high-ascii characters in a character set other than iso-8859-1, the result
of this patch is undefined.

Fixes #826

Fix filter issue where negative logic prevents matches

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

The quickList() method will attempt to ask the database to find filters that
might match the incoming ticket information. The idea is that MySQL is
likely faster than PHP. The problem is that it assumes positive logic is
being utilized.

This patch adds all filters with at least one rule with dn_contain
(does-not-contain) or not_equal (not-equal)

Fixes #834 (again)

Fix parsing issue in strtotime()

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

PHP can't discern the difference between d/m/Y and m/d/Y when just the date
is submitted to strtotime(). Unfortunately, strptime() is not available
until PHP 5.1.0. This patch forces datepickers to change their values to
YYYY-MM-DD upon submission to disambiguate parsing issues.

Fixes #832

And freshen up the upgrading guide

Add long lost kb category listing background

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

Use system date format for date picker

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

Previously the American date format (m/d/Y) was used exclusively for
formatting dates in the datepicker widget. This patch enables the widget to
be formatted based on the format set in the admin panel.

Fixes #829

Content disposition parameters are optional

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

If a Content-Disposition header exists for an attachments, it isn't required
to have any parameters (like a file name)

Better email headers for In-Reply-To and References

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

Make captcha text case-insensitive

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

Previous the options defined for the Mailer::send() function were confusing
when sending an In-Reply-To header

Previously, the References header emitted by the system for new thread
entry auto-responses and alerts included the message-id for which the email
was a reply in the `References` header. This patch corrects the issue by
placing the reply message-id in the In-Reply-To header, and constructs a
correct References header.

That is, if available, the References header received in the email that was
used to create the thread entry is appended to the message-id the email is
actually in reply to. This is the expected usage of the References header.

Support ticket thread items in email templates

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

Strip quoted reply revisited

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

Order FAQ by question

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

Remove accidental inclusion of remote web page

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

* %{ticket.thread.original} represents the original message submitted when
    creating the ticket
* %{ticket.thread.lastmessage} represents the most recent message submitted
    by the end user

The XKCD index page was accidentally added when testing a new feature for
osTicket-1.8

Include category when searching the knowledge base 

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

Support non-standard port numbers for MySQLi

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

Mark tickets overdue which have no SLA

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

Make Crypto::random() more reliable on Windows

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

Handle parsing email if Reply-To header is missing

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

Reduce cost of deleting orphaned files

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

Support updating the source of the ticket

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

Die on redirect

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