Requires authentication plugins to implement a new AuthDirectorySearch
interface to define the two functions

Displaying field values on various pages and dialogs could result in cross
site scripting exploits.

Fixes osTicket/osTicket-1.8#296

Previously, the user information could only be modified on the ticket-view
page. For instance, if creating a new ticket for a user, no new information
could be added or modified on the user until after the ticket was created

Fixes osTicket/osTicket-1.8#281

This includes the initial concept of pluggable authentication along with the
initial concept for a plugin management system.

Change fromForm routine takes the actual form and do validation and call
fromVars with clean data

Add fromVars to do the actual user creation (previously named fromForm.

Include all validation erors

Include all validation erors

- Remove Client form
- Provide name and email fields for cases where use is not selected (JS
issues)

Fix odd CSS error

Allows the client to be changed on a ticket. Previously, only the
information about the client associated with the ticket was editable. This
patch permits assigning a completely different user to the ticket.

This moves client information like name and email address out of the general
dynamic forms data for a ticket. It really paves the way for the first-class
user of the future.