Remove broken links for OHW and try to update the OHW documentation.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>

Index: trunk/pc-bios/README
===================================================================
--- trunk.orig/pc-bios/README	2009-03-31 18:13:25.000000000 +0200
+++ trunk/pc-bios/README	2009-03-31 18:14:07.000000000 +0200
@@ -32,7 +32,7 @@
   git://git.kernel.org/pub/scm/virt/vgabios/vgabios.git
 
 - The PowerPC Open Hack'Ware Open Firmware Compatible BIOS is
-  available at http://perso.magic.fr/l_indien/OpenHackWare/index.htm.
+  no longer supported and will be removed in the future.
 
 - video.x is a PowerMac NDRV compatible driver for a VGA frame
   buffer. It comes from the Mac-on-Linux project
Index: trunk/qemu-doc.texi
===================================================================
--- trunk.orig/qemu-doc.texi	2009-03-31 18:18:25.000000000 +0200
+++ trunk/qemu-doc.texi	2009-03-31 18:18:30.000000000 +0200
@@ -1654,8 +1654,9 @@
 PC compatible keyboard and mouse.
 @end itemize
 
-QEMU uses the Open Hack'Ware Open Firmware Compatible BIOS available at
-@url{http://perso.magic.fr/l_indien/OpenHackWare/index.htm}.
+Earlier versions of QEMU used the Open Hack'Ware Open Firmware Compatible BIOS.
+It is still provided for compatiblity reasons (PREP platform),
+but it is no longer supported.
 
 Since version 0.9.1, QEMU uses OpenBIOS @url{http://www.openbios.org/}
 for the g3beige and mac99 PowerMac machines. OpenBIOS is a free (GPL
@@ -1689,9 +1690,6 @@
 @c man end
 
 
-More information is available at
-@url{http://perso.magic.fr/l_indien/qemu-ppc/}.
-
 @node Sparc32 System emulator
 @section Sparc32 System emulator