The goal is to handle the error cases:
- Non-existing users shouldn't be room owners or message senders
- 'Room not found' should be returned if the room does not exist

Other functional changes:
- Name and subject are not required, because they shouldn't be.
  They have defaults, and they can be removed in a custom config schema.
- Only room owner should be able to kick room members.

Operations are broken into reusable steps, and a fold operation is
used to iterate over them.

- Handle the new error cases from the API module.
- Pass name and subject in the config map.
- Remove permission checking, which is done in mod_muc_light_api now.

- Update some operation names
- Pass room name and subject in a map
- Convert printed JIDs to binaries

- Protect 'mucDomain' on room creation.
  The reason is that a domain admin shouldn't be able to create a room
  at a different domain. The operation directly calls the MUC Light backend.
- Room JID is always bare
- Require 'mod_mam_muc' for message archive
- Make name and subject optional, as they should be.
  they have default values, and the user could even remove them from the
  config schema.

- Run the archive-related tests with and without MAM
- Test the new error conditions

Handle new error conditions.

Remove domain/incremental db deletes

Co-authored-by: Nelson Vides <[email protected]>

GraphQL error handling in MUC Light

Improve error handling in metric API

Improve error handling in session

Refactored hook handlers in ejabberd_ctl

Also added links to the releases (to be consistent).
Bullet points are more easy to read.
Added more info, for example, for years 2018-2019.
Removed Next, Next, Next sentences, because the order is in reverse.

None of the remaining HTTP handlers have 'cowboy' in their names,
and there is no reason why the user would have to know that currently
we are using Cowboy. This is an implementation detail that might
change anyway.

Improve error handling in vcard

The latest version of 'egrep' prints the following warning:

egrep: warning: egrep is obsolescent; using grep -E

Also: don't use the '-e' option when not necessary.

Update npm to work with the latest SpectaQL

Removed ejabberd_hooks module

Revert history order

Use a direct link to docss to avoid redirect
Update history with Graphql and API info

Fixing errors in mod_private

Add importUsers to GraphQL

Update GraphQL docs and history