Allow usage with Drush7, now that *.drush.load.inc's aren't being included.

http/Provision/Service/http/apache.php

@@ -17,7 +17,8 @@ class Provision_Service_http_apache extends Provision_Service_http_public {
     $this->configs['server'][] = 'Provision_Config_Apache_Server';
     $this->configs['platform'][] = 'Provision_Config_Apache_Platform';
     $this->configs['site'][] = 'Provision_Config_Apache_Site';
-    if (subdirs_drush_load()) {
+    $features = drush_get_option('hosting_features', array());
+    if (array_key_exists('subdirs', $features) && $features['subdirs']) {
       $this->configs['site'][] = 'Provision_Config_Apache_Subdir';
       $this->configs['site'][] = 'Provision_Config_Apache_SubdirVhost';
     }