wpa_supplicant for ad-hoc mode

[Shawn Rutledge]

For what it's worth, ad-hoc mode is working when I use the latest
wpa_supplicant from git (calls itself 0.7.0).  There were some fixes
to the proprietary Socket P300 driver from Embwise... maybe that has
something to do with it.  My custom GUI sends something like

SET_NETWORK 5 mode 1

and so mode=1 gets put into the conf file.  If wpa_gui is not yet
doing the same thing, I still think it should.