Update for release 3.6

Author: xavierleroy

doc/index.html

@@ -24,7 +24,7 @@
 
 <H1 align="center">The CompCert verified compiler</H1>
 <H2 align="center">Commented Coq development</H2>
-<H3 align="center">Version 3.5, 2019-02-27</H3>
+<H3 align="center">Version 3.6, 2019-09-17</H3>
 
 <H2>Introduction</H2>
 
@@ -180,7 +180,8 @@ <H3>Compiler passes</H3>
 </TR>
 
 <TR valign="top">
-  <TD>Recognition of operators<br>and addressing modes</TD>
+  <TD>Recognition of operators<br>and addressing modes;<br>
+      if-conversion</TD>
   <TD>Cminor to CminorSel</TD>
   <TD><A HREF="html/compcert.backend.Selection.html">Selection</A><br>
       <A HREF="html/compcert.powerpc.SelectOp.html"><I>SelectOp</I></A><br>