Issue #1954892 by dawehner, tim.plunkett, David_Rothstein, effulgentsia: Replace 'theme callback' and hook_custom_theme() with a clean theme negotiation system.
Issue #2004086 by dawehner, pwolanin, katbailey, tim.plunkett, vijaycs85, fabpot: The Request service must be synthetic.
Issue #1851018 by alexpott, attiks, xjm: Improve breakpoint configuration implementation.
Issue #2139407 by amateescu: HEAD broken on Windows.
Issue #2111823 by amateescu, dawehner: Convert field_ui / Entity local tasks to YAML definitions.
Issue #2102777 by tstoeckler, Gábor Hojtsy: Fix docs for update to theme_links
Issue #213887 by Xano: Fix up PluginBag documentation
Issue #2120035 by samhassell, dawehner: Clean up docs headers for views include files
Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob.
Revert "Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob."

Bah. Wrong commit message.

This reverts commit 843d7d66141f086e2ab6fb4c291d874582895fe6.
Rollback of Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob. — breaks testbot.
Migrate in core #2125717 by mikeryan, chx, marvil07, bdone, jessehs, mpgeek, BTMash, fastangel, mongolito404, Moshe Weitzman, eliza411, YesCT, dawehner, cosmicdreams
Issue #2099133 by Wim Leers: Comment form on same page as comments forces node render caching to be per user.
Issue #2115061 by JeroenT, tim.plunkett: Remove direct calls to drupal_add_html_head_link().
Issue #2054055 by seanr: Bartik inappropriately styles all links in the footer, rather than links inside blocks in the footer, breaking contextual links in the process.
Revert "Issue #1954892 by dawehner, tim.plunkett, David_Rothstein, effulgentsia: Replace 'theme callback' and hook_custom_theme() with a clean theme negotiation system."

This reverts commit fc04601c357609f6cae7cb3ae6c71610d44647e5.
Issue #2103635 by claudiu.cristea | fietserwin: Remove effects from ImageInterface.
Issue #1892530 by amateescu, larowlan, grisendo, pwolanin: XSS in image file description (forward port of SA-CORE-2013-003).
Issue #2140447 by larowlan, Heine: Open redirect in overlay (forward port of SA-CORE-2013-003).
Issue #2140459 by amateescu, larowlan, David_Rothstein: Color module XSS in appearance settings.