(cherry picked from commit e3d81645)

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2117305 by disasm, Pavan B S, ieguskiza, Jo Fitzgerald: Replace usages of db_or() and db_and()

Issue #2801899 by shashikant_chauhan, daffie, axel.rutz: Rename Drupal\Core\Database\Connection::rollback() to Drupal\Core\Database\Connection::rollBack()

Issue #2451395 by dawehner, catch, fgm, David_Rothstein: drupal_get_schema()/drupal_get_complete_schema() no longer work as expected; remove them

Issue #2401843 by lahoosascoots, jhodgdon: Move all *.api.php files except system.api.php out of system module directory

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #1923406 by stefan.r, yannickoo, catch, Crell, amateescu, pwolanin, morgantocker, Damien Tournoud, sun: Use ASCII character set on alphanumeric fields so we can index all 255 characters

Revert "Issue #1923406 by stefan.r, yannickoo: Use ASCII character set on alphanumeric fields so we can index all 255 characters"

This reverts commit ac4e35ce.

Issue #1923406 by stefan.r, yannickoo: Use ASCII character set on alphanumeric fields so we can index all 255 characters

Issue #2469941 by wadmiraal, jhodgdon: Move database-related hook docs from system.api.php to a new database.api.php file