add docs for --serial-number
diff --git a/doc/html/documentation.html b/doc/html/documentation.html
index 8b2c4c3..3273a01 100644
--- a/doc/html/documentation.html
+++ b/doc/html/documentation.html
@@ -448,6 +448,14 @@
</TR>
<TR>
<TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
+ <TT>--serial-number=#</TT>
+ </TD>
+ <TD>
+ When used with --ogg, specifies the serial number to use the for the FLAC stream. When encoding and no serial number is given, flac uses '0'. When decoding and no number is given, flac uses the serial number of the first page.<P>
+ </TD>
+ </TR>
+ <TR>
+ <TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
<TT>--lax</TT>
</TD>
<TD>