v 1.2 update
     - bug fix of code path for blocking sends. would return EAGAIN
       when it needs to block
     - change default socket size behaviour
 
v 1.1 update
      
v 1.0 initial release
      1.0.1 semaphores
      1.0.2 add a config script for a hostfile 
      1.0.3 fix a missing MSG_DONTWAIT, return EAGAIN after a probe
      1.0.4 improves crossing messages with zc
      1.0.5 add flow control , ECONNRESET for EOF
      1.0.6 fix a race for simultaneous connects, improve poll/select
            performance

v 0.6 support for fast connections, low latencies, zero copy,
      including crossing sends of large data

v 0.2 support for select, etc . messages are send/recvd via mx func
              data thread needed for poll. be quiet otherwise
	      add support for MSG_PEEK

v 0.1 initial MX port