* reverted otavios patch again because it breaks the following behaviour:

* reverted otavios patch again because it breaks the following behaviour:
  A depends on X|Y
  B depends on Y
  With the old code we get:
  "apt-get install A B": we get "A B X Y"
  "apt-get install B A": we get "A B Y"
  With the new code there is no way to get this right and we always end
  up with "A B X Y" because we just go over the packages in the order
  that they are in the cache and run MarkInstall(AutoInstall=true) on
  them then. When A comes before B we always end up with the unneeded X
  dependency.