-If the \c{host} you specify is a saved session, PSCP uses any port
-number specified in that saved session. If not, PSCP uses the default
-SSH port, 22. The \c{-P} option allows you specify the port number to
-connect to for PSCP's SSH connection.
+The older SCP protocol does not have a written specification and
+leaves a lot of detail to the server platform. Wildcards are expanded
+on the server. The simple design means that any wildcard specification
+supported by the server platform (such as brace expansion) can be
+used, but also leads to interoperability issues such as with filename
+quoting (for instance, where filenames contain spaces), and also the
+security issue described in \k{pscp-usage-basics}.