Changes
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- LXC images are being provided again (generated from the LXD ones)
- root/webui users are not disabled on container images anymore
- Add a new utility (command line) script `nc-broadcast` to notify all Nextcloud users
- Notify docker users about the discontinuation of NCP docker (more information [here](https://help.nextcloud.com/t/nextcloudpi-planning-to-discontinue-its-docker-version-with-nc-25))
- LXD/LXC images receive support for the following ncp apps:
- nc-autoupdate-ncp
- nc-update
- nc-datadir
- nc-database
- UFW
- nc-audit
- SSH
- fail2ban
- nc-nextcloud
- nc-init
- samba
Fixes
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- Exclude btrfs snapshots from backup monitoring in `ncp-metrics` for all container variants
- Use systemd backend for ssh jail in `fail2ban` (/var/log/auth.log may not be available)
- Increase mysql max_allowed_packet (fixes [1752](https://github.com/nextcloud/nextcloudpi/issues/1752))