* store a node's verbosity in the node so that e.g. disabling warnings
    also disables warnings for this node in pass_1
   (the above together fix mantis #12076)
  * save/restore verbosity with {$push}/{$pop} (mantis #12075)
  * if warnings/notes/hints are turned off, also do not count encountered
    ones for the totals (otherwise -Sew cannot be used properly in
    combination with {$warnings off}, because disabled warnings will still
    trigger a compiler error) -- this required adding -vw/-vn/-vh to all
    tests using -Sew/-Sen/-Seh
  - removed some superfluous state saving/restoring from firstpass()

git-svn-id: trunk@12025 -