add network-manager support to /etc/acpi/wireless.sh

please evaluate this patch

Note to self, this is related to bug #20667 and there's some notes on:

  http://mail.gnome.org/archives/networkmanager-list/2005-November/msg00097.html

it is great if we can use both methods, the setWirelessEnabled when
using the hotkey and the sleep one when sleeping!

in the case that we cannot use the dbus command to disable wireless because the applet does not get updated (bug or not?) we can still want to build a c file that uses the nm function

void nma_dbus_enable_wireless (NMApplet *applet, gboolean enabled)

checking the code if you pass to this function the applet and the status you want to set, it first calls setWirelessEnabled with that value, and then updates the applet menu.
The only difficould thing is how we can obtain the "instance" of the applet

Sorry that function does not update the menu item.
Also we should decide if the menu item should be unchecked or hidden

if we just uncheck the item there is the risk that the user re-enables it, and the led/rf_kill will no more be synced.
So in my opinion the best thing to do is to hide this item from the menu using

gtk_widget_hide (applet->stop_wireless_item); /* during off */
gtk_widget_show_all (applet->stop_wireless_item); /* during on */

future network-manager adds support for this. Bye bye