ap: find-ifaces list all ifaces if hw_mode arg is not given
ap: fix sed options: -ir != -i -r
ap: fix model_id parsing in get-bssid
ap: select channels based on scan results
ap: write the channel selection list to rundir
ap: fix PCI device id parsing
ap: add bssid mask quirk for Zotacs
ap: fix bash array expansion
ap: fix vendor and product id parsing
ap: exit early if suitable radios were not found
ap: suppress iwlist scan error output
ap: print exit value to stderr
ap: update TODO
ap: inline setup_services()
ap: determine HT capabilities dynamically

This allows us to write hostapd configurations with correct HT
capabilities based on the real capabilities of the hardware radio.