Each network thread has its own io_service - this means that all operations on a given socket except queueing packets run from a single thread, removing the need for locking
Sending packets now writes to a lockfree intermediate queue directly, encryption is applied in network thread if it was required at the time of sending the packet
(cherry picked from commit 97a79af4701621ec04b88c8b548dbc35d120e99e)
Naios