Problem: it takes two Ctrl-C's to kill mshell
Problem: it takes two Ctrl-C's to kill mshell

Solution: fixed client API destructor in zproto, rebuilt the code
here. It now exits cleanly with one Ctrl-C, as you'd expect.

gotcha/malamute,asokoloski/malamute,tberkey/malamute-core,malanka/malamute,vyskocilm/malamute-core,hintjens/malamute,hintjens/malamute,hurtonm/malamute,malanka/malamute,zeromq/malamute,opedroso/malamute,opedroso/malamute,vyskocilm/malamute-core,hurtonm/malamute,zoobab/malamute,asokoloski/malamute,hurtonm/malamute,trevorbernard/malamute-core,lnls-dig/malamute,karolhrdina/malamute,QbaseLLC/malamute-core,lnls-dig/malamute,gotcha/malamute,hurtonm/malamute,hurtonm/malamute,hintjens/malamute,gotcha/malamute,hintjens/malamute,karolhrdina/malamute,trevorbernard/malamute-core,zoobab/malamute,hintjens/malamute,zoobab/malamute,QbaseLLC/malamute-core,opedroso/malamute,zoobab/malamute,trevorbernard/malamute-core,asokoloski/malamute,karolhrdina/malamute,lnls-dig/malamute,karolhrdina/malamute,malanka/malamute,gotcha/malamute,zoobab/malamute,malanka/malamute,lnls-dig/malamute,gotcha/malamute,QbaseLLC/malamute-core,tberkey/malamute-core,opedroso/malamute,karolhrdina/malamute,asokoloski/malamute,opedroso/malamute,zeromq/malamute,zoobab/malamute,karolhrdina/malamute,hurtonm/malamute,asokoloski/malamute,hintjens/malamute,zeromq/malamute,malanka/malamute,zoobab/malamute,opedroso/malamute,gotcha/malamute,malanka/malamute,asokoloski/malamute,vyskocilm/malamute-core,vyskocilm/malamute-core,zeromq/malamute,hurtonm/malamute,vyskocilm/malamute-core,malanka/malamute,lnls-dig/malamute,karolhrdina/malamute,zeromq/malamute,lnls-dig/malamute,vyskocilm/malamute-core,opedroso/malamute,trevorbernard/malamute-core,asokoloski/malamute,zeromq/malamute,vyskocilm/malamute-core,lnls-dig/malamute,gotcha/malamute,hintjens/malamute,tberkey/malamute-core,zeromq/malamute