Merge branch 'stable-2.11'

* stable-2.11:
  Add built-in documentation.
  Force ticket service off
  Restore anonymous repositories browse capability
  Minor refactoring of gitewb config URLs
  Top menu improvements
  Get rid of hacked Wicket version

Change-Id: I03b48683138d5faf04f5405b65405df8b24e3ae7