# <public-remote-addr>,<public-remote-port>
# <private-local-addr>,<private-remote-addr>,<mtu>,<proto>
# <keepalive>,<timeout>
# <public-remote-addr>,<public-remote-port>
# <private-local-addr>,<private-remote-addr>,<mtu>,<proto>
# <keepalive>,<timeout>
# <public-local-addr'>,<public-local-port'>
# <private-remote-addr>,<private-local-addr>,<mtu>,<proto>
# <keepalive>,<timeout>
# <public-local-addr'>,<public-local-port'>
# <private-remote-addr>,<private-local-addr>,<mtu>,<proto>
# <keepalive>,<timeout>
# <public-local-foo> <public-local-foo'> <public-local-foo'>
# (-m not specified) (-m specified)
# actual addr/port that addr/port `Wait'
# <public-local-foo> <public-local-foo'> <public-local-foo'>
# (-m not specified) (-m specified)
# actual addr/port that addr/port `Wait'
#
# udptunnel will userv ipif locally, as
# userv root ipif <private-local-addr>,<private-remote-addr>,<mtu>,<proto>
#
# udptunnel will userv ipif locally, as
# userv root ipif <private-local-addr>,<private-remote-addr>,<mtu>,<proto>
# or, if -l was given, userv root ipif is replaced with the argument(s)
# following -l option(s) until `.'.
#
# or, if -l was given, userv root ipif is replaced with the argument(s)
# following -l option(s) until `.'.
#