Incorrect ulink in Internet/xx/web-apps.xml file

[Artur Szymanski]

Hi translators,

During translation of Internet template I found incorrect link under
Section 9.3.3 IRC instant messaging in "Install xchat-gnome package".
When you click this link in help page you should be able to install this
package, but because of missing "apt:" inside of ulink tag, you will see
error instead.

I already reported this to bugtracker (see
https://bugs.launchpad.net/ubuntu/+source/ubuntu-docs/+bug/356933). You
 should change it also in your translation templates.

Best Regards,
Artur