Fix issues with first-time account registration

Summary: This worked originally, but the migration broke slightly after the
config was deprecated, and there was another minor issue during setup.

resources/sql/patches/20130619.authconf.php

@@ -45,7 +45,7 @@ $config_map = array(
   ),
   'PhabricatorAuthProviderPassword'       => array(
     'enabled' => 'auth.password-auth-enabled',
-    'enabled-default' => true,
+    'enabled-default' => false,
     'registration' => false,
     'type' => 'password',
     'domain' => 'self',

src/applications/auth/controller/PhabricatorAuthRegisterController.php

@@ -442,6 +442,12 @@ final class PhabricatorAuthRegisterController
 
   private function loadSetupAccount() {
     $provider = new PhabricatorAuthProviderPassword();
+    $provider->attachProviderConfig(
+      id(new PhabricatorAuthProviderConfig())
+        ->setShouldAllowRegistration(1)
+        ->setShouldAllowLogin(1)
+        ->setIsEnabled(true));
+
     $account = $provider->getDefaultExternalAccount();
     $response = null;
     return array($account, $provider, $response);