Maintenance release. Changes since 7.x-2.1:
Issue #1797652 by Patrick R.: Fixed Bug in locale_variable_language_element_validate().
Issue #1786156: Bad translations of character count.
Issue #1670238 by mkalkbrenner: variable_realm randomly breaks custom realms
Issue #1741148 by lund.mikkel: Fixed Bad translation of causes html errors when importing.
issue #1737070 by mkalkbrenner: variable_realm_set() should trigger hook_variable_update()
Issue #906698 by Jose Reyero: Add variable information for all Drupal core modules. Adding block caching variable.
Issue #906698 by Jose Reyero: Add variable information for all Drupal core modules. Adding system performance variables.
Issue #1701410 by esbite: Fixed Variable realms not working for variable_module_form(), variable_edit_form().