SRF - eventcalendar clicktarget parameter

Introduced with pull request 200 and available since the SRF 2.5.0 release.

{{#ask:
 [[Has date::+]]
 |?Has date
 |format=eventcalendar
 |start=latest
 |clicktarget=Special:FormEdit/Event/Event {{#time: U | now }}?event[hasDate]=%clickyear%-%clickmonth%-%clickday%&returnto={{FULLPAGENAME}}
 |sort=Has date
 |order=desc
 |limit=100
}}