Glad to announce new version. Here is new features and plain changelog

• New permission for chat, now operators can have or not permission to open already opened chats. This disables reading other persons chats. Except for users who have permission.
• This permission takes effect only if user does not have permission to all chats.
• Leave a message functionality

Enhancements:

• Added support for managing permission for extensions. Names will be listed in literal mode not in system mode.

Bugfix:

• Avoid undefined index expand

execute doc/update_db/update_23.sql and follow standard upgrade instructions

Demo also was updated.