Added link to comics about DNS (issue kottans#309)

tasks/linux-cli-http.md

@@ -56,6 +56,7 @@ When you finish this task you can proceed to the next one.
 - [HTTP: Протокол, который должен знать каждый веб-разработчик (Часть 1) (РУС)](https://code.tutsplus.com/ru/tutorials/http-the-protocol-every-web-developer-must-know-part-1--net-31177)
 - [How I taught myself to code in eight weeks](http://lifehacker.com/how-i-taught-myself-to-code-in-eight-weeks-511615189)
 - [How JavaScript works: Deep dive into WebSockets and HTTP/2 with SSE + how to pick the right path](https://blog.sessionstack.com/how-javascript-works-deep-dive-into-websockets-and-http-2-with-sse-how-to-pick-the-right-path-584e6b8e3bf7)
+- [How DNS works](https://howdns.works)
 
 ## Optional