ACTION_ICAL_SEARCH ACTION Endpoint
  /rpc/action/?method=ACTION_ICAL_SEARCH  
  Get a ICAL/ICS compliant stream for diary actions/events.  
  PARAMETERS TYPE NOTES
  AllUsers Text (1) Y / N [default]. Only include actions for the logged on user
  CalendarName Text (50) Defaults to 'mydigitalstructure Calendar'
  DescriptionFormat Numeric 1 [default] - Just have the action description. 2 - Also append the ActionByText
  LocationType Numeric 1 - Leave blank. 2 [default] - Take from Action's contact
  Package Numeric Mandatory.  Id of the filtering as saved via CORE_SEARCH_PACKAGE_MANAGE. This should contain all the filtering you require to isolate the correct actions
  Rows Numeric Optional. Defaults to 20.
  SummaryFormat Numeric 1 [default] - Just have the action reference / subject. 2 - Also append the Contact Business and Contact Business Phone Number of the Action's Contact Person
  RETURN  
  ICS  ICS formatted string
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