to trigger/signal a rebuild for the transition 5.8.8 -> 5.10.0.
The list of packages is computed by finding all packages which end
up having either of PERL5_USE_PACKLIST, BUILDLINK_API_DEPENDS.perl,
or PERL5_PACKLIST defined in their make setup (tested via
"make show-vars VARNAMES=...").
This module processes iCalendar (vCalendar 2.0) files as specified in
RFC 2445 into a data structure. It handles recurrences ("RRULE"s),
exclusions ("EXDATE"s), event updates (events with a "RECURRENCE-ID"),
and nested data structures ("ATTENDEES" and "VALARM"s).
