Using [<protocol>/<port>] selectors in the
local_ts and remote_ts child parameters, three IPsec tunnels
between the roadwarrior carol and the gateway moon are defined.
The first CHILD_SA is restricted to ICMP request packets, the second
covers ICMP reply pachets and the third TCP-based FTP and SSH connections.
The established tunnels are tested by carol by first pinging alice
behind moon and then setting up an SSH session to the same client.