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  to validate other form submissions, not just comments. Two new functions
  are introduced, form_token() and form_validate(). The first function uses
  a private key and a public key to set a token in a hidden field. The second
  function validates the token. The comment and contect module are updated to
  use these functions.

  + made it possible to specify a subject when submitting a message on the contact form.
  + fixed some bugs/glitches.

  TODO: document the defaults in the PHPdoc comments.

  TODO: we should write down a couple guidelines for these document them in
        the PHPDoc code of drupal_set_message()!  .

- Patch 20910 by chx: centralize print theme page.

- Added a simple contact module to core.