On Fedora 26, start.sh fails with these error messages.
Failed to connect to wpa_supplicant global interface: /tmp/wpas-wlan0 error: Permission denied
Failed to connect to wpa_supplicant global interface: /tmp/wpas-wlan0 error: Permission denied
...
This is because Fedora 26 uses "wheel" group as administrative group.
Signed-off-by: Masashi Honma <masashi.honma@gmail.com>