fix typos in "stonehouse" security example
fix typos in "stonehouse" security example

Most importantly, the script you need to run first is
"generate_keys.py", not "generate_certificates".

ArvinPan/pyzmq,dash-dash/pyzmq,yyt030/pyzmq,caidongyun/pyzmq,swn1/pyzmq,caidongyun/pyzmq,dash-dash/pyzmq,ArvinPan/pyzmq,yyt030/pyzmq,Mustard-Systems-Ltd/pyzmq,Mustard-Systems-Ltd/pyzmq,Mustard-Systems-Ltd/pyzmq,ArvinPan/pyzmq,yyt030/pyzmq,dash-dash/pyzmq,caidongyun/pyzmq,swn1/pyzmq,swn1/pyzmq