Issue #2275877 by Mixologic, duellj, Les Lim, Xano, David Strauss: Replace master/slave terminology with primary/replica.

Issue #2146733 by andypost, chx, InternetDevels, bohart: Select queries should not use rowCount() to calculate number of rows.

Issue #1614186 by RobLoach, tim.plunkett, msonnabaum, Crell, jhodgdon, Niklas Fiekas: Update coding standards for using 'native' PHP classes like stdClass in namespaced code.

Issue #2057809 by StephaneQ, Berdir, chx, dawehner: Fix up param/return documentation in database API

Issue #2004350 by Berdir, Dean Reilly: Fixed Unserialised database connection objects don't use Drupal's PDO Statement class.

Issue #203955 by pdrake, webchick, andrewsl, iflista: Create database at installation time if the db user has appropriate permissions.

Issue #843114 by sun, quicksketch, Berdir, c960657, Crell: Fixed DatabaseConnection::__construct() and DatabaseConnection_mysql()::__construct() leaks  (Too many connections).

Issue #692366 by underq, bradweikel, willmoy, kid_icarus | foripepe: Fixed Stop forcing language/mirror for PHP manual links.

Rename classes to remove the redundant Database prefix and move query exceptions into the query namespace.

Let getDriverClass() handle defaults, so that extenders work. Also use it in more places, eliminating the old-school crappy approach.

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