I've just rolled out version 5.0 of the Virtualmin virtual-server module. This is a major new release (thus the 5.0 designator). This release will coincide with changes in the install script happening tonight, to make Authentic Theme the default theme and Filemin the default file manager.
There will be some additional announcements about changes in the Virtualmin system as a whole (including instructions for updating your installations to the new defaults, should you want to do so), but, this announcement just covers the virtual-server module itself (which also has major new features and updates).
Changes since 4.18:
The big changes are PHP 7 and much more flexible support for many PHP versions, as well as better detection of SCL-installed PHP versions, and support for Let's Encrypt! Let's Encrypt provides free domain-validated SSL/TLS certificates in an automated fashion, making it easier and cheaper to secure all of your websites (without the certificate warnings that come from self-signed certificates). Webmin has gotten support for Let's Encrypt, as well, in its latest release.
Because this release has really big updates, there will likely be issues (whether in usability or simply bugs); please let us know if you have problems with the new features!