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Package updates:
* Nextcloud updated to 23.0.12 (and its apps also updated).
* Roundcube updated to 1.6.1.
* Z-Push to 2.7.0, which has compatibility for Ubuntu 22.04, so it works again.
Mail:
* Roundcube's password change page is now working again.
Control panel:
* Allow setting the backup location's S3 region name for non-AWS S3-compatible backup hosts.
* Control panel pages can be opened in a new tab/window and bookmarked and browser history navigation now works.
* Add a Copy button to put the rsync backup public key on clipboard.
* Allow secondary DNS xfr: items added in the control panel to be hostnames too.
* Fixed issue where sshkeygen fails when IPv6 is disabled.
* Fixed issue opening munin reports.
* Fixed report formatting in status emails sent to the administrator.