Fix Bug#24199.

Fix Bug#24199.

* lisp/calendar/icalendar.el (icalendar--do-create-ical-alarm): Quote
  bracket in doc string (make checkdoc happy).
  (icalendar-import-buffer),
  (icalendar-import-buffer),
  (icalendar--convert-ical-to-diary),
  (icalendar--add-diary-entry): Rename argument diary-file to
  diary-filename (make checkdoc happy).
  (icalendar--convert-recurring-to-diary): Take care of byday-clause
  in monthly recurring events.  Actually fix Bug#24199.

* test/lisp/calendar/icalendar-tests.el (icalendar-import-bug-24199): New.