early DTLS handshake failures would not terminate the read
loop and cause the remaining handshake bytes to be feed to
packet reader, causing an error assertion.
Rework the main read loop to terminate it when the read
event is not longer active and stop the read event on
handshake failure.
Also, make the DTLS handshake erorr message a bit more readable
by appending the WolfSSL error message to it.
Fixes issue #8.
Complete the IEEE802.11 Station Association with interation of AC in LocalMAC mode.
After the IEEE802.11 Authorization / Association is complete, the AC can now
authorize the WTP to accept data station packets with Station Configuration Message.
