---- Changes since 1.130 ----
Improved the code for finding the openssl program for generating certificates.
Added the ability to restrict allowed Unix users who can login as Webmin users.
---- Changes since 1.150 ----
Added a Module Config option for an alternate user and group list display, which takes up less space on systems with a large number of Webmin users.
---- Changes since 1.160 ----
When editing a Webmin user or group, modules are now displayed under category headings.
---- Changes since 1.170 ----
Added a button to the user editing page for switching the current Webmin login to that user, without needing to know his password.
---- Changes since 1.180 ----
Added module hiding button to the group page, as in the user page.
---- Changes since 1.190 ----
Users and groups can now be backed up using the Backup Configuration Files module.
---- Changes since 1.200 ----
Users and groups with the same name can now be created. Internally, Webmin now uses .gacl files instead of .acl to store group ACL settings.
---- Changes since 1.210 ----
Enhanced the  Unix User Authentication page to allow different access to be granted to different users and group members.
---- Changes since 1.220 ----
Users can now be temporarily locked without their passwords being lost.
---- Changes since 1.230 ----
CIDR-format network addresses can now be used in the IP access control field.
The inactivity logout time can now be set on a per-Webmin user basis, rather than the global setting in the Webmin Configuration module applying to all users.
---- Changes since 1.250 ----
Added checkboxes and buttons on the module's main page for deleting several users and groups at once.
Webmin users created and managed by other modules can be marked as non-editable, to prevent them from being edited when any changes would be over-written.
The IP addresses of connected users are displayed on the sessions page.
---- Changes since 1.260 ----
Added the ability to control which hours of the day and days of the week a Webmin user can login.
---- Changes since 1.290 ----
Added an option on the Unix User Authentication page to allow Unix users who can sudo to root to login to Webmin with root privileges.
Added an option to the Unix User Authentication that lets users who pass PAM validation but have no Unix or Webmin account login as a selected Webmin user.
