hidden: move hiddenrevs set on the repository This set is always accessed through the repo for now. Having this set carried by the changelog make it complicated to: - initialize it, computing hidden set may involve revset call - lazy compute it, (1) only the changelog can detect someone access it, (2) only the repo have enought knowledge to compute it. In later version I expect he changelog to apply filtering itself and the set to be carried by changelog again.

--- a/tests/test-log.t	Fri Jul 13 14:38:49 2012 +0200
+++ b/tests/test-log.t	Mon Jul 16 17:44:46 2012 +0200
@@ -1146,7 +1146,7 @@
   > def reposetup(ui, repo):
   >     for line in repo.opener('hidden'):
   >         ctx = repo[line.strip()]
-  >         repo.changelog.hiddenrevs.add(ctx.rev())
+  >         repo.hiddenrevs.add(ctx.rev())
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "hidden=$HGTMP/testhidden.py" >> $HGRCPATH