发现一个新的bug：RJ45拔掉，无法切换到wirelesss

zangcf

但是关闭USB是可以，这明显是wireless部分接收了USB拔出的事件。

zangcf

#zcfdebug++<<
on property:init.svc.dhcpcd_eth0=run
    start dhcpcd_eth0

#on property:init.svc.dhcpcd_eth0=stopped
#    start dhcpcd_eth0

on property:rj45.ethernet.state=detached
        stop dhcpcd_eth0

on property:rj45.ethernet.state=attached
        start dhcpcd_eth0

on property:usb.ethernet.state=detached
        stop dhcpcd_eth0

on property:usb.ethernet.state=attached
        start dhcpcd_eth0
#zcfdebug>>++