This is a new script that can call any function in the built-in AJAX webservice. This is
a new system service that is added at install time (like the mobile webservice). It has no
protocols added to it, but it accessible by a new ajax script /lib/ajax/service.php.
Requests and responses to the script are required to be in json format, and multiple functions can
be called in a single request.
Also:
- We don't allow users to add deprecated functions to WS
- We show a debugging message when deprecated functions
are already being used in web services.
VALUE_REQUIRED - if the parameter is not supplied, there is an error
VALUE_OPTIONAL - if the parameter is not supplied, then the param has no value
VALUE_DEFAULT - if the parameter is not supplied, then the default value is used