This is available from Install the Server. It adds support for:
To take advantage of these features requires the wikipublisher library version 2.2.01 for PmWiki 2.1.27 and above, including PmWiki 2.2beta65. This also includes a number of fixes to comply with PmWiki 2.2.
Sites that have customised the Site.*Template pages will need to revert to the default settings to take advantage of the new div and hr features.
The latest library can be downloaded from the PmWiki Cookbook. See also Upgrading to PmWiki 22.