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.

MDL-45041 Web Service: add_user_device doesn't store entries for different users using the same push key

On some pages full user data is not stored before user_created/
user_updated event is triggred. So giving option to trigger that
manually, so it can be triggred after all data is saved

This reverts commit bb32a499.

Add webservice for adding files to user private files.

Adrian Greeve authored Apr 24, 2013 and Damyon Wiese committed Jul 09, 2013

Add support for additional name fields and flexible formating of
user names.

MDL-29938 throw exception when a criteria is repeated, used self instead classname when possible, return only not deleted users

MDL-29938 Fix typo bypassing some code + remove misplaced code in deprecated function + some code cleaning

MDL-29938 don't validate return user info against PARAM_USERNAME as PARAM_USERNAME only apply to manual authentication (and web service)

MDL-35543 modify get_users to get_users_by_field (more complex search function named get_users will be implemented later - focussing yet on retrieving user info for a specified field)

unifies core_user_get_users_by_id and get_course_user_profiles

Conflicts:

	user/lib.php

MDL-32581 support additional format field with all text field in extrnal lib function + new possible ws params to decide how format is returned (which are stored in a singleton)

Conflicts:

	group/externallib.php

MDL-31762 username should be lowercase and check against PARAM_USERNAME when creating/updating user by web service

Currently there is no validation on user info (firstname/lastname) in user/editadvanced_form.php