Author: Shish
Blocks with lower priority number appear higher up the page.
The userclass parameter can be left empty for blocks to show to everyone, or specified as a comma-separated, case-insensitive list of user classes that will see that block. Spaces around the comma get stripped.
For example, to show ads only to regular users and anonymous user classes:
- "<ad here>":
user, anonymous - "Thanks for supporting us!":
supporter