2008-02-27 Wang Xin Free memory returned by icaltime_as_ical_string. More info, please refer to #516408. * calendar/cal-backend-wcap-events.c: * calendar/cal-backend-wcap-tasks.c: * calendar/cal-backend-wcap.c: * calendar/cal-backend-wcap.h: * configure.in: Bump to 2.21.91. * lib/sunone-connection.c: * lib/sunone-util.c: 2008-02-27 Wang Xin Free memory returned by icalcomponent_as_ical_string. More info, please refer to #516408. * calendar/cal-backend-wcap-events.c: * calendar/cal-backend-wcap.c: * storage/sunone-invitation-list-model.c: * storage/sunone-invitation-list.c: