specify the argument name

Author: vladak

network.tex

@@ -1412,7 +1412,8 @@
 after each call or nullify \texttt{revents}. To deselect a file descriptor,
 set the \texttt{fd} member of the \texttt{pollfd} structure to -1
 (or reshuffle the array which is significantly more complex).
-\item Time set to -1 has the same effect as \texttt{NULL} for \texttt{select}.
+\item The \texttt{timeout} argument value set to -1 has the same effect
+as \texttt{NULL} for \texttt{select}.
 \item If the number of descriptors is set to 0 (\texttt{fds} should be then
 \texttt{NULL}), \texttt{poll} can be simply used to sleep with less than one
 second granularity. Example: \hlabel{POLL_SLEEP_C} \example{sleep/poll-sleep.c}