test/: Add a couple of tests for recurrent items

This adds tests for following features/scenarios:

* Recurrent appointments and events of all (repetition) types.
* Recurrent appointments with a duration of more than 24 hours.
* Overlapping recurrent appointments.
* Recurrent items and leap years.
* Recurrent items with an end date.
* Recurrent items with exceptions.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

test/recur-002.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if [ "$1" = 'actual' ]; then
+  "$CALCURSE" --read-only -D "$DATA_DIR"/ -c "$DATA_DIR/apts-recur" \
+    -d02/01/2000 --format-recur-apt=''
+elif [ "$1" = 'expected' ]; then
+  cat <<EOD
+02/01/00:
+ * Each day since 2000-01-01
+ * Each first day of the month since 2000-01-01
+EOD
+else
+  ./run-test "$0"
+fi