Update http links to https and sync www.php.net URLs (#14854)
pdo_mysql: "--" should be followed by a whitespace character This required changing how YYFILL works, with no apparent regressions
pdo_pgsql: add support for dollar-quotes RFC: http://wiki.php.net/rfc/pdo_driver_specific_parsers
Implemented PDO Driver specific SQL parsers RFC: http://wiki.php.net/rfc/pdo_driver_specific_parsers