Create the Nginx vhost path directory

In particular, the default /usr/local/etc/nginx/sites-enabled directory does not
exist on installation of Nginx on FreeBSD.

tasks/vhosts.yml

@@ -7,6 +7,13 @@
   notify:
     - reload nginx
 
+- name: Create nginx_vhost_path directory.
+  file:
+    path: "{{ nginx_vhost_path }}"
+    state: directory
+  notify:
+    - reload nginx
+
 - name: Add managed vhost config file (if any vhosts are configured).
   template:
     src: vhosts.j2