Issue #2128055 by slashrsm, anavarre, timhilliard, estoyausente, nielsvm, effulgentsia, rteijeiro, rootwork, stijntilleman, jonhattan, Crell, webchick, Dave Reid, attiks, meba, Fidelix, Pls, toamit, brantwynn, YesCT, erwangel: Files should be uploaded to directories based on tokens by default

Issue #1914914 by purdy_nc, meba, chx, heyrocker: Add to docs of file_scan_directory to discuss excluding config

Issue #2089351 by thedavidmeister, meba: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/includes.

- Patch #456088 by dww, JohnAlbin | Dave Reid, Gábor Hojtsy, pwolanin, tic2000, meba: sub-themes not notified of security updates for base themes.

#368729 by meba: (i18n sprint) Fix error during multilingual installation because of NULL value on required field.

- Patch #64967 by Arancaytar, meba: ereg -> preg for performance reasons and future compatilbility.  PHP6 is rumoured to drop ereg support.

#216014 report by meba, patch by myself: menu_install() did not use get_t() for its menu item creation

#207779 report by meba, patch by myself: missing plural formatting in forum module, and a counter display fix as well

#149567 by chx and meba: set install_task variable to 'done' on update, so installer cannot be run on Drupal 6 on an upgraded site

161496 by meba: display message about successful login, if registration verification is not required

#145748 by meba, after coding style fixes: disable the checkbox on the default language, so it cannot be disabled (the submit handler already disallows disabling it)

#136837 by meba: PHP replaces {} enclosed variables in strings with the variable value itself, so cache tables were not prefixable