mac80211: restructure /lib/wifi/mac80211.sh use the new multi-bss single...

mac80211: restructure /lib/wifi/mac80211.sh use the new multi-bss single instance hostapd mode move mac80211 specific bits out of /lib/wifi/hostapd.sh add a new option 'htmode' for switching between HT20 and HT40+,HT40-

SVN-Revision: 19235