Also, rename other apc_xxx functio to the new apcu_xxx equivalents available
since PHP 5.4.

Use APCu, if available, to cache the compiled model meta data.

Previously, the create method was used to create a new instance of an orm
model (which would later result in an INSERT when persisted); however, some
classes require or utilize varying parameters to their create() method,
which PHP7 considers an error. Methods in subclasses must be defined with a
calling signature compatible with the parent class.

This patch shifts the concept of model creation to the constructor. Now, the
constructor of ORM models is required to be compatible with that of
ModelBase class. Now that most models do not define a constructor, this is
much easier to control, and much more logical.

Also, remove an issue where assignments on a relationship field to an
instance of a super class of the foreign model would raise an error. This
was previously addressed by re-classing the instance in the
ModelInstanceManager::getOrBuild(); however that design would create
multiple instances of the same object in memory, which defeats one of the
primary design concepts of the ORM. This patch addresses the issue by
allowing super-classes of the declared foreign model in relationship
assignments.

This commit attempts to remove all coding standard warnings emitted by PHP
7.0.

login: Client SSO Destination

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

Consider the destination clicked prior to SSO authentication.

collars: Add avatars to the popup mgmt dialog

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

Fix for issue 2574 and 2672

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

Issue/2877

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

forms: Fix search by date time fields

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

This changes the storage model for datetime fields and stores them in the
same format as the MySQL `datetime` column type. This allows for the
searching code to be consistent when searching the database for
datetime custom form entry data.

v1.10 rc2 issues

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

Users & Orgs export

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

Change orgs listing to ORM
Add cdata tables support for users and organizations

v1.10 Fixes

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

osTicket supports filtering allowable files on the client-side via JS as
well as server-side on upload.

Ajax based upload skipped server-side validation with the assumption that
the client already validated the file upload. For most cases this is a valid
assumption (ajax only works if JS is enabled) but fails to account for cases
where HTTP requests is intercepted and changed on transit or the request is
posted directly to the ajax interface.

This commit forces server-side file upload validation.

Catch InconsistentModelException on config load to allow for fallback to old
config table when upgrade is pending.

https://github.com/osTicket/osTicket-1.8/issues/2672

This is commit reverts prior commit to prevent email loops by dead-banning
alerts and auto-responses based on recent communication with the end user.

Cast email adddress to string

Require subject and message go send mail filter action