[Building Sakai] default "bottomnav.1" needs a tweak

[will at serensoft.com]

In the default sakai.properties, bottomnav.1 is defined as:

bottomnav.1 = <a href="https://localhost/portal/site/!gateway">Gateway</a>

it should instead be:

bottomnav.1 = <a href="/portal/site/!gateway">Gateway</a>

since 1) we don't know for sure whether this is server is answering to
http:// or https://, and 2) localhost is likely to be the browser's
loacl machine, not the remote sakai server.

-- 
will trillich
"Our only real economic security lies in our power to meet human
needs." -- S.Covery, the 8th Habit