Rolf Kutz wrote:
b) Make incremential updates, 6.16->6.17...6.22
Unless otherwise noted this shouldn't be necessary between major versions. From d.o/upgrade we have:
Minor update procedure With a minor release update; such as from Drupal 6.1 to the latest Drupal 6.x version, you do not have to apply all the updates that have been released between the versions. You can jump directly from 6.1 to that version.
See http://drupal.org/node/3060/release for release notes.