Fix docs. The code base doesn't work on Windows 98 anymore.

doc/install.html

@@ -105,7 +105,7 @@ operating systems, CPUs and compilers:
 <td class="compatos"><a href="#posix">Linux</a> or<br><a href="#android">Android</a></td>
 <td class="compatos"><a href="#posix">*BSD, Other</a></td>
 <td class="compatos"><a href="#posix">OSX 10.3+</a> or<br><a href="#ios">iOS 3.0+</a></td>
-<td class="compatos"><a href="#windows">Windows<br>98/XP/Vista/7</a></td>
+<td class="compatos"><a href="#windows">Windows<br>XP/Vista/7</a></td>
 </tr>
 <tr class="odd separate">
 <td class="compatcpu">x86 (32 bit)</td>