simpletest 6.x-2.10

SimpleTest 6.x-2.10, 2009-12-30
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- Bugs
   * Correct INSTALL.txt link URL in requirement check.
   * #587304: Call to undefined function drupal_realpath().
   * #587988: drupal_http_request() does not use drupal_generate_test_ua().
   * Manual fix of --file argument for run-tests.sh.
   * #596440 by grendzy: assertMail doesn't work on real modules - Class 'DrupalWebTestCase' not found.
   * #603410: Missing backported error handler in _drupal_bootstrap_full().
   * #640076: Link to file INSTALL.txt should use url().
   * #654534 by sun: SimpleTest deletes *all* files.
   * #649344 by joachim: Link in admin help message to INSTALL file is broken.
- Changes:
   * #580406: DrupalUnitTestCase requires Database class.
   * #667546: INSTALL.txt text correction.
- Backports:
   * #653860 by yhahn: Ensure simpletest JS handlers are attached only once.