[OctDev] pkg update behavior

[JuanPi <aj...@gm...>]

Hi,

I received a oral request to make "pkg update" keep the autoload
configuration define by the user. Apparently currently it doesn't.
Also to make it accept a list of package to update.

I added this to the wiki.

-- 
JuanPi Carbajal
-----
"It is one thing not to be able to perform a certain feat, but quite
another to prove that it cannot be done." - Henry Ernest Dudeney
-----
http://ailab.ifi.uzh.ch/carbajal/