A simpler improvement to relayd (checking the arp table before expiring)

So instead of running a process heavy static arp broadcaster client/server service, I realized that I could just make relayd a bit smarter in order to properly detect disconnected hosts faster (simply by double checking the arp table). I was also able to compile this software in an Ubuntu VM running in a VirtualBox on OSX for mips & armv7 (archer c7 tplink & wrt1900acs wifi extended setup):

https://github.com/stoops/relayd/compare/master…stoops:moddel

./relayd -I wlan0 -I wlan1 -t 2 -p -1 -B -D -P

With a couple of arp table clean up helper scripts the setup is much simpler with this and less involved in managing the arp table entries!

mode:  ap  |  ssid:  Peppi Place      bmac: 00:be:ee:ca:fe:01  key: psk2+ccmp  |  freq: 2.4GHz  chan:   1  mode:  HT40  |  timeouts: 300 300
mode:  ap  |  ssid:  Peppi Place      bmac: 00:be:ee:ca:fe:11  key: psk2+ccmp  |  freq: 2.4GHz  chan:  11  mode:  HT40  |  timeouts: 300 300
mode:  ap  |  ssid:  Peppi Place      bmac: 00:be:ee:ca:fe:61  key: psk2+ccmp  |  freq: 5.0GHz  chan: 161  mode: VHT80  |  timeouts: 300 300
mode:  ap  |  ssid:  Peppi Place AC   bmac: 00:be:ee:ca:fe:63  key: psk2+ccmp  |  freq: 5.0GHz  chan: 161  mode: VHT80  |  timeouts: 300 300

A simpler improvement to relayd (checking the arp table before expiring)

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