* Fixed tools/potato/upgrade.sh for s/1/CD1/ change and include the upgrade

stuff on all CD1* ...
* Added some explication in README.

README

@@ -42,6 +42,7 @@ For people that do not have time, here's the quick explanation :
 Edit the CONF.sh and change the PATHs for the mirror and so on.
 $ vim CONF.sh
 $ . CONF.sh
+$ make distclean
 $ make status
 $ make list COMPLETE=1 SIZELIMIT1=555000000 SRCSIZELIMIT=665000000
 $ make official_images
@@ -73,6 +74,9 @@ The process of building a CD is decomposed as follow :
   tree. If you can't do this, you'll have to use the symlink farm.
   The symlink farm is explained at the end of this README.
 
+- let's clean everything that may still be there from previous runs :
+  $ make distclean
+
 - now we'll check if your mirror is ok (with good Packages files) :
   $ make mirrorcheck
 

tools/potato/upgrade.sh

@@ -9,8 +9,11 @@ for arch in i386 alpha sparc m68k
 do
   if [ "$ARCH" = "$arch" -a -d "$MIRROR/dists/$CODENAME/main/upgrade-$ARCH" ];
   then
-    cp -a $MIRROR/dists/$CODENAME/main/upgrade-$ARCH $TDIR/$CODENAME-$ARCH/1/
+    for dir in $TDIR/$CODENAME-$ARCH/CD1*
-    mv $TDIR/$CODENAME-$ARCH/1/upgrade-$ARCH $TDIR/$CODENAME-$ARCH/1/upgrade
+    do
+      cp -a $MIRROR/dists/$CODENAME/main/upgrade-$ARCH $dir/
+      mv $dir/upgrade-$ARCH $dir/upgrade
+    done
   fi
 done