Small changes in online.tex

Fix the problem that latex2html doesn't know \texorpdfstring.
Update the version and date.

Author: tueda

doc/manual/online.tex

@@ -5,6 +5,10 @@
 
 \usepackage{makeidx}
 
+\begin{htmlonly}
+\def\texorpdfstring#1#2{#1}
+\end{htmlonly}
+
 %\makeatletter
 %\renewcommand*\l@section{\@dottedtocline{1}{1.5em}{3.0em}}
 %\makeatother
@@ -40,9 +44,9 @@
 \begin{document}
 
 \begin{center}
-{\Huge FORM \\ \Large version 4.0 \\ \huge Reference manual} \\
+{\Huge FORM \\ \Large version 4.1 \\ \huge Reference manual} \\
 
-{29-mar-2012} \\
+{25-oct-2013} \\
 
 {J.A.M.~Vermaseren, J.~Kuipers, M.~Tentyukov, T.~Ueda and J.~Vollinga}
 \end{center}