Usage of /usr/bin/multirootca:
  -a string
    	listening address (default ":8888")
  -l string
    	specify a default label
  -loglevel int
    	Log level (0 = DEBUG, 5 = FATAL) (default 1)
  -roots string
    	configuration file specifying root keys
  -tls-cert string
    	server certificate
  -tls-key string
    	server private key