Issue #2433599 by Wim Leers: Ensure every (non-views) pager automatically associates a matching cache context

Issue #2345753 by tim.plunkett, dawehner, Wim Leers, damiankloip: Remove url(current_path()) and url(NULL) with <current> and <none>.

Issue #2343661 by larowlan, tim.plunkett | xjm: Rename l() to _l() and url() to _url(), and document replacements.

Issue #1912608 by Cottser, ckrina, jamesquinton, lauriii, jwilson3, mgifford, scaragucc' | criz: Update pagination markup for new CSS standards and improved accessibility.

Issue #2173655 by Cottser, xjm, jessebeach, alexpott, rlmumford: Refactor theme() to _theme(); make it a private API to discourage module developers from circumventing the renderable build system.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, alexpott, larowlan, Damien Tournoud: Replace almost all remaining superglobals (, , etc.) with Symfony Request object.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, larowlan, Damien Tournoud: Replace all remaining superglobals (, , etc.) with Symfony Request object.

Issue #2109065 by ianthomas_uk, jhodgdon: Fixed Remove variable_get() and variable_set() calls from API documentation.

Issue #2002650 by mrsinguyen, chertzog, legolasbo, Erik Erskine, rhm50, sandergo90, grisendo, targoo, janstoeckler, maximpodorov, beowulf1416: Improve maintainability by removing unused local variables.

This reverts commit 127b54a6.

Issue #1363112 by mparker17, mgifford, tlattimore, Jacine, dcmouyard, bowersox, ry5n, ahdiaz: Simplify names of 'element-x' helper classes.

Issue #891112 by Berdir, sun, Amitaibu, siharris, Cottser: Replace theme_item_list()'s 'data' items with render elements.

Issue #1410574 by tim.plunkett, sun, bleen18, danillonunes: Make l() respect the URL query string before adding the 'active' CSS class.

Issue #1700382 by Albert Volkman, cam8001: Replace remaining references to drupal_attributes() with new Attributes().

- Patch #1183208 by effulgentsia, Niklas Fiekas, katbailey, no_commit_credit, catch: remove variable_get()('clean_url()') and switch to index.php/path pattern for dirty URL support.

Issue #41595 by pillarsdotnet, m3avrck, sun et al: Fixed All pager links have an 'active' CSS class.

Initial move and rename of database classes to PSR-0 namespaces.  So far only MySQL has been converted.

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.

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