[ANNOUNCE] Libical 3.0.11

[Allen Winter]

Announcing Libical 3.0.11.  This is the 11th bugfix release for Libical 3.0
This release is binary and source compatible with version 3.0.0.

Highlights of this Release:
-----------------------------------
 * Fix icalrecur_iterator_set_start() for hourly, minutely, and secondly recurrences
 * Fix build for Berkeley DB version greater than 5
 * Fix vcal for some architectures (like aarch64, ppc64le and s390x)
 * Fix memory leaks in vcal
 * Prevent crash when looking for tzid in initialize_rscale
 * Adjust libdir and includedir in generated pkgconfig files
 * Built-in timezones updated to tzdata2021c

The source code can be found on GitHub at: https://github.com/libical/libical

Tarballs and zipballs for v3.0.11 are available from: https://github.com/libical/libical/releases

"Libical is an Open Source implementation of the iCalendar protocols and protocol data units.
The iCalendar specification describes how calendar clients can communicate with calendar
servers so users can store their calendar data and arrange meetings with other users."

Libical implements:
* RFC5545, RFC5546, RFC7529
 * the CalDav scheduling extensions in RFC6638
 * iCalendar extensions in RFC7986
 * plus the iCalendar iMIP protocol in RFC6047.

 For more information about Libical, please visit http://libical.github.io/libical/