Added flags support for mysqli::real_connect in Mysqli driver.

Merge pull request #595 from JeroenDeDauw/testGivenForeignKeyWithZeroLength_acceptForeignKeyThrowsException

Add testGivenForeignKeyWithZeroLength_acceptForeignKeyThrowsException

Some much needed cleanup in the TestUtil class

Prevent Connection from maintaining a second reference to an injected PDO object.

Prevent Connection from maintaining a second reference to an injected PDO object. Previously, if a developer explicitly closed the Connection, only the _conn reference was destroyed, but the _params['pdo'] reference remained and kept the PDO connection alive. By unsetting the _params reference, we maintain only the _conn reference, exactly as if the PDO connection is generated internally.

Correct SQL Anywhere driver default port to 2638

References:
SQLA16 - http://dcx.sybase.com/index.html#sa160/en/dbadmin/serverport-network-conparm.html
SQLA12 - http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.sqlanywhere.11.0.1/dbadmin_en11/serverport-network-conparm.html

Update security.rst

Update security.rst

Fix: property access is not allowed yet

Fixes the warning emitted by mysqli when sqlstate is not set (yet?).
http://git.php.net/?p=php-src.git;a=blob;f=ext/mysqli/mysqli_prop.c;h=2d36336372b75922bd8fbf40c5c9054a5230c8a0;hb=HEAD#l36

Warning masks actual connection error.

[DBAL-474] Fix filtering sequence names on PostgreSQL

Fix DateTimeTz type compatibility on SQL Anywhere versions < 12

Fix FOR UPDATE SQL on SQL Anywhere

[DBAL-801] Add date arithmetic interval methods for seconds, minutes, weeks, quarters and years

Close #598

Adding doctrine-dbal to composer.json and making it work just like doctrine command (from Doctrine ORM)

Remove @param tags that add no value

Add missing imports

Remove type hint template clutter

Minor cleanup in SchemaManagerFunctionalTestCase

Removed unused field

Remove ref to class that does not exist

Remove duplicate suggest section in composer.json