make all threads daemon
remove p2p firmware downloading code
log arping
try start hotspot using wlan0 on 4334
remove missing handlers
revert the hack of bcm4334; log wpa_supplicant; increase time out
change default dns back to google
save config after p2p persistent network deleted
poll command quicker
remove packaged linkers
revert shell_execute
bump up version to 1.8.6