Implement BlockChecksum in Device

diff --cc bacula/technotes
index bd61638160f4956545d22295a7c683f563a66f2c,33bdee270aa9756a3ddf385307c645bafd9c1ee2..b103319729eaf4b5936b16e9560f4286ff3943f0
--- 1/bacula/technotes
--- 2/bacula/technotes
+++ b/bacula/technotes
@@@ -3,8 -3,7 +3,9 @@@
  General:
  
  04Sep09
 +kes  Implement BlockChecksum in Device to be able to turn off checksum
 +       for performance reasons
+ ebl  btape: Add speed command and test drive speed with Bacula blocks
  03Sep09
  ebl  Use MaxFileSize device configuration in btape
  ebl  Make less tweaks in random buffer in btape