forms: Show ••• placeholder for saved pw entries

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

If navigating back to the ticket queue (after closing a ticket, for
instance), return to the queue previously viewed.

(Most notably is the mail from Outlook, which embeds block elements inside
of <font> elements.)

validator: Verify MX record of email addresses

Peter Rotich <peter@osticket.com>

session: Add support for Memcache as a session backend

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

db: Drop tables before adding and renaming

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

fast fix for deployment on windows #2032 

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

include: Fix typo

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

If the email address in use by the end user is not valid, display a warning
on the ticket view page. This allows an agent to easily flag potential spam
or correct a legitimate email address before sending a response and
receiving a bounce notice.

This allows detection of some incorrectly-typed email addresses before
tickets, users, and agents are created.

The PHP session system will hold a lock on the session until it is released.
It is important to release the session before performing long-running tasks
so that further requests from the agent are not locked.

orgs: Touch `updated` time when custom data is updated

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

Logged user fix

oops: Fix bad HTML entity #2

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

Fix image CID rewrite for some pasted images

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

users: Update information on CSV import

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

i18n: Translate gb2312 to gbk charset

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

html: Ensure text internal note preserved

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

Preserve text formatting on the internal note posted to a new ticket by
staff if HTML thread is disabled.

This is necessary for some mail clients which indicate encoding in GB2312
but actually use GBK encoding.

tnef: Fix various TNEF processing issues

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

email: Properly detect bounce message with alternative content

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

fix translation for "Add new list"

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

Fix a few translatable phrase issues

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

mailer: Embed the Message-Id token in @class

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