Fix pxeconfig to match newer nbhelper changes

Change-Id: I75931ec6c89cca04202cf0faaa1227d8ce633548
diff --git a/playbooks/mainweb-playbook.yml b/playbooks/mainweb-playbook.yml
index 0c15504..2aa3158 100644
--- a/playbooks/mainweb-playbook.yml
+++ b/playbooks/mainweb-playbook.yml
@@ -1,8 +1,8 @@
 ---
-# Ansible playbook to configure the ONF website
+# Ansible playbook to configure a PHP + mariadb websserver
 
-- name: Configure the main ONF webserver
-  hosts: onfweb
+- name: Configure a general-purpose webserver with PHP and mariadb support
+  hosts: website
   become: true
   roles:
     - users