Typical peer's behaviour is following:
-@verbatiminclude sp.utxt
+@verbatiminclude sp.plantuml.txt
@enumerate
@item Perform @emph{Noise-IK} handshake:
Ignore it if it is too nice.
@item If already downloaded file exists, then queue @emph{DONE}
sending.
- @item If @file{.seen} exists, then queue @emph{DONE} sending.
+ @item If @file{seen/XXX} exists, then queue @emph{DONE} sending.
@item If @file{.part} exists, then queue @emph{FREQ} sending with
corresponding offset.
@end itemize