Indirect scanning ('iwlist scan') should report information about
hidden APs. When an AP is hidden it does not respond to active scanning,
we thus have to use passive scanning to locate these APs.

This fixes http://bughost.org/bugzilla/show_bug.cgi?id=1499Signed-off-by: NReinette Chatre <reinette.chatre@intel.com>
Tested-by: NBill Moss <bmoss@clemson.edu>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>