Description:

Added support for the latest versions of IETF drafts:

- draft-ietf-jmap-calendars
- draft-ietf-calext-jscalendarbis
- draft-ietf-calext-jscalendar-icalendar
- draft-ietf-calext-icalendar-jscalendar-extensions

Also added a new experimental httpd module "convert" that converts between
media types for selected content types. Initially it only converts between
iCalendar and JSCalendar, according to the definition of the IETF draft
draft-ietf-calext-jscalendar-icalendar. This module is not meant for
production use and is not enabled by default.

Documentation:

docsrc/download/installation/http/convert.rst

Config changes:

New value "convert" for the httpmodules option.

Upgrade instructions:

None.

GitHub issue:

None
