ad lots of options

Author: Vladimir Kotal

intro.tex

@@ -2091,6 +2091,10 @@
 of options and arguments.
 \item The \texttt{-W} option should be reserved for vendor options, i.e. for
 non-portable extensions.
+\item When you used all the letters of the alphabet for options, something
+is not right with the design of the command. One solution would be to
+split the processing and introduce the notion of sub-commands. See for
+example the \texttt{zfs} command on systems with the ZFS file-system.
 \end{itemize}
 
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