<command arg="-root"/>
- <video href="http://www.youtube.com/watch?v=XEL8g3qbthE"/>
+ <video href="https://www.youtube.com/watch?v=XEL8g3qbthE"/>
<hgroup>
<vgroup>
Alternately, it can run a simulation that doesn't involve hosts.
-http://en.wikipedia.org/wiki/Ping#History
+https://en.wikipedia.org/wiki/Ping#History
Written by Jamie Zawinski and Stephen Martin; 1998.
</_description>