support dashes in schemes for db drivers, translated to underscores

lib/Doctrine/DBAL/DriverManager.php

@@ -238,6 +238,7 @@ final class DriverManager
         }
         
         if (isset($url['scheme'])) {
+            $url['scheme'] = str_replace('-', '_', $url['scheme']); // URL schemes must not contain underscores, but dashes are ok
             if (isset(self::$_driverSchemeAliases[$url['scheme']])) {
                 $params['driver'] = self::$_driverSchemeAliases[$url['scheme']]; // use alias
             } else {

tests/Doctrine/Tests/DBAL/DriverManagerTest.php

@@ -199,6 +199,10 @@ class DriverManagerTest extends \Doctrine\Tests\DbalTestCase
                 'drizzle_pdo_mysql://foo:bar@localhost/baz',
                 false,
             ),
+            'simple URL with fallthrough scheme containing dashes works' => array(
+                'drizzle-pdo-mysql://foo:bar@localhost/baz',
+                array('user' => 'foo', 'password' => 'bar', 'host' => 'localhost', 'dbname' => 'baz', 'driver' => 'Doctrine\DBAL\Driver\DrizzlePDOMySql\Driver'),
+            ),
         );
     }
 }
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