Implement --wprocket

* cleanup templates by using variables
* add configuration for wp-rocket
* update mapping for wp-rocket

wo/cli/templates/redis.mustache

@@ -1,4 +1,4 @@
-# Redis NGINX CONFIGURATION - WO v3.9.5
+# Redis NGINX CONFIGURATION - WO v3.9.7
 # DO NOT MODIFY, ALL CHANGES WILL BE LOST AFTER AN WordOps (wo) UPDATE
 # $skip_cache variable set in /etc/nginx/conf.d/map-wp.conf
 
@@ -39,5 +39,5 @@ location ~ \.php$ {
   more_set_headers 'X-SRCache-Store-Status $srcache_store_status';
 
   include fastcgi_params;
-  fastcgi_pass php72;
+  fastcgi_pass {{upstream}};
 }