Revert "- Patch #1174938 by ericduran, aspilicious, voxpelli: natively support the HTML5 #required FAPI property. Woot!"

This reverts commit 8945bee7.

- Patch #1229868 by nicl, DjebbZ: hook_form_BASE_FORM_ID_alter(), hook_form_alter(), and hook_form_FORM_ID_alter() doc inconsistent.

- Patch #1174938 by ericduran, aspilicious, voxpelli: natively support the HTML5 #required FAPI property. Woot!

Issue #866292 by marcingy, ygerasimov, attiks, quicksketch: Fixed '0' not displayed as checkbox / radios options (nor as any element #title).

Issue #381994 by xjm, good_man, elcuco, et al: Fixed Machine-name fields are always in Latin characters, and should therefore always be LTR.

Issue #635046 by claudiu.cristea, sun, fago: Fixed form_state_values_clean() is polluting form values.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #240828 by sun, xjm, David_Rothstein, yoroy: 'This form is outdated. Reload the page and try again' is incorrect and confuses users.

- Patch #1272686 by Paul Simard, bfroehle, beejeebus: convert existing cache_* calls to the new cache()-> API.

Issue #1118016 by dereine, pwolanin: Fixed conditional visibility of a managed_file() using #states attribute does not work.

- Patch #1174444 by Boobaa, xjm, Dave Reid: Make the _element_validate_()* functions in field.module available for all contrib modules to use.

- Patch #1162802 by Liam Morland: Asterisk * used for required or changed marker should be in abbr not span.

Issue #1136130 by pillarsdotnet: Reinstated WATCHDOG_* constants; using PHP equivalents caused issues on Windows.

Issue #1096448 by bfroehle: Changed drupal_redirect_form() needs better documentation of form_state['redirect'].

#690980 by Dave Reid, grendzy, cwgordon7: Security hardening: Ensure password fields are empty on display.

#994870 by sun: Fixed Custom #type machine_name 'exists' callbacks cannot access other form elements/values

#992928 by das-peter, David_Rothstein: Fixed Command line (Drush) install fails on SQLite (#limit_validation_errors doesn't work for programmatic form submissions)