_('Export of shown shifts. <ahref="%s">iCal format</a> or <ahref="%s">JSON format</a> available (please keep secret, otherwise <ahref="%s">reset the api key</a>).'),
* Returns a hint for the user how the ical feature works.
*/
function ical_hint() {
global $user;
return heading(
_('iCal export'), 2)
. '<p>' . sprintf(
_('Export of shown shifts. <ahref="%s">iCal format</a> or <ahref="%s">JSON format</a> available (please keep secret, otherwise <ahref="%s">reset the api key</a>).'),