Update README.md

Author: fbbdev

README.md

@@ -9,9 +9,9 @@ node-fastcgi
 
 [![NPM](https://nodei.co/npm/node-fastcgi.png?downloads=true)](https://nodei.co/npm/node-fastcgi/)
 
-This module is a replacement for node's http module (server only). It can be used to build FastCGI applications or to convert existing node applications to FastCGI.
+This module is a drop-in replacement for node's http module (server only). It can be used to build FastCGI applications or to convert existing node applications to FastCGI.
 
-The implementation is fully compliant with [FastCGI 1.0 Specification](http://www.fastcgi.com/drupal/node/6?q=node/22).
+The implementation is fully compliant with the [FastCGI 1.0 Specification](http://www.fastcgi.com/drupal/node/6?q=node/22).
 
 Example
 -------