Allow MW extensions to parse incoming URL variables. Possible uses include:

• Conveying state from the referring page
  • Autosubmission of content (such as the referring page, the title of the

referring page, the username of the user on the referring (non-public) page,
etc) to the target page

• • Modification of the displayed page based on URL variables
• Creating wikilinks which redirect dynamically to pages, based on the output of

a function of URL variables

Of course the list of variables that would be accepted through any variable
handle, and the functions that would be allowed to process those variables,
should be greatly restricted.

Version: unspecified
Severity: enhancement