Changes to Get Settings

added the optional property general/anyOf[subschema #1: General]/custom_variables to the response with the 200 status

added the optional property general/anyOf[subschema #1: General]/on_hold_timeout_action to the response with the 200 status

added the optional property notification_enable/anyOf[subschema #1: NotificationEnable]/api_key to the response with the 200 status

added the optional property notification_enable/anyOf[subschema #1: NotificationEnable]/node/recovered to the response with the 200 status

added the optional property notification_settings/anyOf[subschema #1: NotificationSettings]/channels/api_key to the response with the 200 status

added the optional property subscription/anyOf[subschema #1: Subscription]/custom_variables to the response with the 200 status

added the optional property subscription/anyOf[subschema #1: Subscription]/header_placement to the response with the 200 status

the require_hwid_for_manual_sub response's property default value changed from true to false for the status 200