This reverts commit 132aed37.

Issue #717834 by David_Rothstein, clemens.tolboom, catch: Fixed The dependencies declared in core's hook_update_dependencies() implementations aren't actually correct.

- Patch #1184082 by googletorp: like queries failing on postgres with standard_conforming_strings() turned on.

Issue #981524 by das-peter, Pisco, sun: Fixed system_date_format_save() doesn't save localized date formats.

- Patch #1216886 by pounard: _lock_id() shouldn't use drupal_static(), any cache clear would potentially make locks stall.

- Patch #1224802 by kiamlaluno: DrupalLocalStreamWrapper::stream_open() uses a local variable instead of the argument passed by reference.

- Patch #774040 by B-Prod, mattyoung: theme_item_list() function duplicates last  value when dealing with children.

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

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

- Patch #1174686 by ksenzee: overlay parent improperly opens child overlay on specific external links.

Issue #303189 by Darren Oh, fietserwin, q0rban, bdragon, osopolar, dboulet, Peter Törnstrand: Fixed Tabledrag doesn't hide columns when the whole table is initially hidden.

Issue #1067998 by eporama, amanaplan, ceefour: Fixed Warning: Invalid argument supplied for foreach() in filter_list_format() (line 675 of /.../modules/filter/filter.module).

Issue #1227426 by Mark Theunissen: Fixed  variable was removed, but is still being assigned in template_preprocess_maintenance_page().

Issue #1222802 by franz, droplet, jhodgdon, Krasnyj: Fixed theme_pager_link() doc missing 'text' variable.

Issue #1196102 by James_Stallings, jhodgdon: Fixed taxonomy_check_vocabulary_hierarchy() doc lacks return value.

Issue #1222794 by gapple, jhodgdon: Fixed drupal_add_css() support for stream wrappers not documented.

Issue #1196116 by James_Stallings, foobar3000: Fixed taxonomy_vocabulary_save() doc needs more detail.

Issue #1196108 by James_Stallings, foobar3000: Fixed taxonomy_get_children() return value doc is not complete.

Issue #936686 by David_Rothstein, Einewton: Fixed 'Installation failed' errors when installing modules from Update Manager w/ Overlay.

Issue #276153 by pwolanin, das-peter: Fixed Testing does not work at all when locale of host session is not English.

Issue #1167458 by yoroy, David_Rothstein, dcmistry: New users do not know to click on 'Modules' to extend their site.