handle recieved I2NP message
 handle SSU I2NP header
send ack
Rewrite the thread stop in Queue
defining vars should cost less than function calls
process ACKs
Merge branch 'master' of https://github.com/orignal/i2pd
Merge pull request #36 from meeh420/master

Rewrite
Adding volatile keyword
external IP detection
Merge branch 'master' of https://github.com/orignal/i2pd
eliminate unnecessary const_cast
UPnP added
Merge branch 'master' of https://github.com/orignal/i2pd
Merge pull request #38 from meeh420/master

Added volatile keyword
SSU send message
Merge branch 'master' of https://github.com/orignal/i2pd
wait for DeliveryStatus message
use SSU if NTCP is not available
handle session destroyed