Install link follow-up

[Gunnar Hjalmarsson <gunnarhj ubuntu com>]

In the thread "Latest changes in gnome-user-docs" I mentioned that the 
install links of the type 'action="install:<package>"' don't work on 
Ubuntu. Want to mention that we found a convenient way to convert those 
links for now when building gnome-user-docs for Ubuntu:

sed -i 's/action="install:/href="apt:/' *.page

A related observation is that such links are not visible on the HTML 
pages. Example:

https://help.gnome.org/users/gnome-help/stable/tips-specialchars.html#compose

It's due to the 'test="action:install"' condition. Is this intentional? 
(Since the 'action="install:<package>"' links don't work for me, I can't 
tell if it's motivated.) In Ubuntu, and since the apt: style links are 
useful also on the HTML pages, we are going to show them there.

--
Gunnar Hjalmarsson
https://launchpad.net/~gunnarhj