[Cooker] switch to task-printing-scanning enabling useless services

[Frederik Himpe]

Since about one week, the package task-printing-scanning is installed by 
default. This package installs by default all printer and scanner drivers and 
daemons, and enables them all, even if there is no relevant hardware present.

The most annoying are hplip and saned packages because they contain services 
that are started automatically at boot.

Even when having a scanner, saned is not necessary: it is only useful if you 
want to share the scanner with other machines in a network.

Please make sure especially these two packages not installed by default 
automatically. They eat memory and slow down startup time if not necessary. 
printerdrake should install them when needed, like was the case in 2007.0.

-- 
Frederik Himpe