class Net::SSH::Proxy::Command

the host name to connect and `%p' by the port.
template. In the command template, `%h' will be substituted by
with the user's shell, which is composed from the given command
Create a new socket factory that tunnels via a command executed

def initialize(command_line_template)
  @command_line_template = command_line_template
  @command_line = nil
  @timeout = 60
end