2) add consoleproxy.launch.max to allow specifying a configured max number of console proxy VM that can be launched within a zone(if not specified, default is 10), this is to prevent possible DoS attacks or uncontrolled usage of system resources
3) Remove some unused code.
These include five new API cmds as well as changes to deployVirtualMachine to
specify an optional name of an SSH key to pass to the VM when starting. When
an SSH key is specified with a password-enabled template the newly created
password is encrypted with the SSH public key and can be retrieved via the
getVMPassword cmd. It is then the user's responsibility to decrypt retrieved
passwords with the correct SSH private key.
