Fixes #575

Fixes #588

Introduced with the multi-stream upgrader

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 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

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.

Addresses #589

  - Logo selection radio buttons not vertically centered (Firefox)
  - font-size value incorrect in login.css
  - Incorrect : placement in FAQ category edit
  - Incorrect block width declaration (700 vs 700px)
  - Browsers disagree on the placement of CSS3 outline properties
  - Correctly place check boxes and radio buttons

We should move initial data out of the install SQL file, which will make way
for a few things:

  * Internationalization -- which breaks the migrater model currently.
        Moving the data outside the install script makes it translatable
        without changing the SQL hash
  * Review -- Migrations which add more data don't highlight new features
        that need review to the adminsitrator

Uses a seven step procedure:
  1. (user) Fails to login twice or more
  2. Clicks the 'Forgot my password' link on the login form
  3. Submits the username or email address and triggers a password-reset
     email
  4. Clicks the link in the email and is directed back to the reset page
  5. Enters the username or email again and is logged in
  6. Password change is forced, but current password is not required
  7. Password is updated, user can continue the session without
     authenticating again

Use %config table by default for config classes

Add lastModified() method to retrieve the time of last modification for a
configuration key

Add $defaults to the specified on a subclass. The defaults remove the
necessity to specify a default value for each getter method, and, the
defaults are integrated into the array retrieved from getInfo()