こんなところ
%% A literal ‘%’. %C Hash of %l%h%p%r. %d Local user's home directory. %h The remote hostname. %i The local user ID. %L The local hostname. %l The local hostname, including the domain name. %n The original remote hostname, as given on the command line. %p The remote port. %r The remote username. %T The local tun(4) or tap(4) network interface assigned if tunnel forwarding was requested, or "NONE" otherwise. %u The local username.