Crypto wrapper - implements tag based en/decryption utils

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

Add password-reset signals for auditing

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

Avoid extra db query for schema signature

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

Ensure cookie path is set for the session cookie

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

Drop old mcrypt class

Which will help against clobbering session cookies against other PHP
applications shared on a parent domain of the domain hosting osTicket or in
a parent folder or virtual folder.

* Move migration scripted tasks to the stream folder naming them .task.php.
* Add a MigrationTask abstract class to server as the base of migration
  tasks.
* Move the migration tasks from class.upgrader to the new task files

Add web.config for IIS to serve the API

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

Sanitize log entries

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

Inline Attachments

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

Properly escape HTML chars in text/plain email bodies

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

Only set "ft" field if requested

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

Add "Assigned To" and other fields to ticket export

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

Add cipher validator - checks to make sure the cipher is valid & available.

Only use 8 bytes (64-bits) for the IV data (salt) for the encryption keys,
except for Mcrypt, which requires you to query the specific length and use
it specifically.

Add test function - basic testing (will be replaced by real test suit)

Incoming messages with empty body and an inline attachment might not have
parts - depending on encoding used.

* Use "-" tag for emails with empty body/message

Refactor logic'

Conflicts:
	include/class.crypto.php

If there characters in the plain text body of the email that appear like
HTML tags, for instance

From: <sip:527772432@172.18.0.2>;tag=952422a9dd1ap1a6o1

The <sip...> part would be removed by the Format::striptags() call in
Format::sanitize().

The "ft" field does not exist when the attachment migration takes place.
Therefore, attachment migration will fail because the records cannot be
inserted into the database due to the missing "ft" field.