Set or get the hostname of the machine the current process is running
on.
+** New function: open-input-string string
+
+Return an input string port which delivers the characters from
+`string'. This procedure, together with `open-input-string' and
+`get-output-string' implements SRFI-6.
+
+** New function: open-output-string
+
+Return an output string port which collects all data written to it.
+The data can then be retrieved by `get-output-string'.
+
+** New function: get-output-string
+
+Return the contents of an output string port.
+
** Deprecated: close-all-ports-except. This was intended for closing
ports in a child process after a fork, but it has the undesirable side
effect of flushing buffers. port-for-each is more flexible.