Update description for the Apache HTTP server.

README.md

@@ -642,7 +642,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
 *Web servers.*
 
 * [Algernon](http://algernon.roboticoverlords.org/) - Web/application server that supports Lua, live-reload, templates, Sass and HTTP/2.
-* [Apache](http://httpd.apache.org/) - Most popular web server.
+* [Apache](http://httpd.apache.org/) - A robust, commercial-grade, featureful implementation of an HTTP (Web) server.
 * [Caddy](https://caddyserver.com/) - Lightweight, general-purpose web server supporting HTTP/2, automatic TLS and easy configuration. Written in Go.
 * [Cherokee](http://cherokee-project.com/) - Lightweight, high-performance web server/reverse proxy.
 * [Hiawatha](https://www.hiawatha-webserver.org/) - Prioritises security, simplicity and performance.