The changeset modifies the "ifup" command to search for related wireless
devices and call "wifi up" on them if applicable. This way the commands for
wireless and non-wireless interfaces are unified from a cli point of view.
The "ifup -a" case has not been changed to keep the logic of the
/etc/init.d/network boot sequence. This might be changed later.
Solves #9763.
SVN-Revision: 27720
