On my server 2.3 alpha, the method metadata_for(meeting_id) gives back {}
(empty Hash). Thus "return if meeting_metadata.nil?" does not occur.

Does @redis.hgetall give {} instead of nil, even though there is a comment in
node_modules/redis/lib/utils.js "hgetall converts its replies to an Object. If
the reply is empty, null is returned"???

* added post_events example and analytics callback

* updated dependency

Bumps [rack](https://github.com/rack/rack) from 2.1.1 to 2.2.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/2.1.1...2.2.3

)

Signed-off-by: dependabot[bot] <support@github.com>

This commit fixes an issue with reading and writing files.
File.open is used which means that a file will remain open
unless explicilty closed or the program exit. This doesn't work
for an NFS mount as the scripts try to "rm -rf" when the file
is still open. This commit fixes that by replacing all .opens
with .reads

There's nothing reasonable we can do here if the font size is missing.

After the last segment of a recording has been archived, it is safe to
delete the original files that were recorded by the various media
handling components. This patch deletes the freeswitch audio files and
kurento webcam/screenshare files after they have been archived.

It needs to be used in combination with some changes to users/groups and
directory permissions to allow the `bigbluebutton` user to delete files
that it could previously only read.

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.7 to 1.10.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.7...v1.10.8

)

Signed-off-by: dependabot[bot] <support@github.com>

Was pointing to the wrong directory when loading the ruby scripts. Also
made the directory easier to configure, it's all in a single place now.

I moved the location of the worker classes around, but forgot to update
the Rakefile to include them from the new location.

The done filenames all have to contain the break_timestamp to identify
the segment

I've moved the workers code into the `lib` subdirectory with other library-ish
code; this puts it into the ruby load path used by most scripts so referencing
files is easier.

I've applied various style cleanups based on the rubocop config present.

The `events` processing step has been integrated as a new worker `EventsWorker`,
there is no longer a separate `events/events.rb` script. I've reworked the
`rap-starter.rb` script to check for the done files in both the events and
recorded status directories.

If the poll size happened to be not an integer, the poll generation would fail.
Round it to an integer for the generation tool.

Write a tool that generates the poll svg images directly from the
BBB poll description. This avoids the issues with special characters
in the gnuplot labels, and gives us a lot more flexibility in how
the polls are formatted and styled.

Changed only in the main class so journald is the default and in the
scripts related to the processes in resque. Internal scripts might still
be logging to files.

Resque captures the exceptions and marks the jobs as failed.

They are optional but it's better to have them than not. If they are passed
and the script doesn't expect it they break.

Instead of just running when a .done file is added, it now also goes
through the files already there when the process starts.

Instead of being executed every 30s by systemd, it's now a service that's
running all the time and will wait for .done files to start the processing
of recordings.

Moved the code that was after the sanity step to its own worker.

It will only process recordings which ID matches the pattern. By default
the pattern is nil and it will process all recordings.

Fixes #8252