port (integer): mandatory if 'address' is specified: the port used
to contact our peer
peer-keys (string): path (prefix) for peer public key set file(s);
- see README.make-secnet-sites re `pub' etc.
+ see README.make-secnet-sites re `pub' etc. and NOTES.peer-keys.
key (sigpubkey closure): our peer's public key (obsolete)
transform (transform closure): how to mangle packets sent between sites
dh (dh closure)