Page update

[Leandro Di Tommaso]

There is a brief tutorial about how to install Nagios2 on Edgy[1] that
I think I can update and extend (with some other configurations).

My doubt is how to do that, because I'm not sure if I should update
the existing tutorial (which is intended for Edgy but works on newer
versiones) or if it is necessary that I create a new one.

Thanks.

[1] https://help.ubuntu.com/community/Nagios2