Improvements to the bk-make-sum BitKeeper summary/submission script:

* use bk:// url to reduce confusion
* remove "Linus, " from introductory output text
* don't diffstat each individual cset; do the entire patch all in
  one go.  Makes the script a -lot- faster when summarizing
  a large number of changesets.

Documentation/BK-usage/bk-make-sum

@@ -7,18 +7,15 @@ DIRBASE=`basename $PWD`
 
 {
 cat <<EOT
-Linus, please do a
+Please do a
 
-	bk pull http://gkernel.bkbits.net/$DIRBASE
+	bk pull bk://gkernel.bkbits.net/$DIRBASE
 
 This will update the following files:
 
 EOT
 
-bk changes -L -d'$unless(:MERGE:){:CSETREV:\n}' $LINUS_REPO |
-while read rev; do
-  bk export -tpatch -r$rev
-done | diffstat -p1 2>/dev/null
+bk export -tpatch -hdu -r`bk repogca $LINUS_REPO`,+ | diffstat -p1 2>/dev/null
 
 cat <<EOT