xl2tpd -V (return code: 1)
xl2tpd version: xl2tpd-1.3.8
xl2tpd --help (return code: 1)
xl2tpd version: xl2tpd-1.3.8
Usage: xl2tpd [-c <config file>] [-s <secret file>] [-p <pid file>]
[-C <control file>] [-D] [-l]
[-v, --version]