reverted @deeky666 suggestion. Since it failed on testBooleanNullConvertsToPHPValue test. 
with message Failed asserting that true is null.
Since I moved this code from BoolenType::convertToPHPValue in the first place, I presume the code there correct.

Updated test for uppercased values

updated convert function  to include uppercased values

Description fix

fixed parameter order in conditions

Changes after Ocramius comments

added literals off and on to the testcase

fixed bug when $item was set as bool true value
added 'off' literal

added postgresql platform conversion test

Changed to call platform specific Boolean conversion

added postgresql literals to Boolean conversion

Default Boolean conversion behaviour

[DBAL-807] Respect schema when renaming indexes

[DBAL-918] Correcting the doc because mysqli doesn't support named parameter natively

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.