a test branch:
* support certificate switch.
Fix bug for server register failure. Fix method is to make the password binary-safe.
A little more process:
* cert manager can generate the certificates and send the ack to client.
Add the cert manager handle part, now the certManager(CM) can send the generated client certificate to the client
Make a little optimization and also do some cleaning work.
Fix commit bug,mainly for empty demoCA/newcerts folder