Fix PDO_DBLIB bugs: #64338, #64808, #63638

Synchronize with master
news for dblib fixes
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  news for dblib fixes
  Fix PDO_DBLIB bugs: #64338, #64808, #63638

Conflicts:
	ext/pdo_dblib/dblib_driver.c
	ext/pdo_dblib/dblib_stmt.c