Support of namespaces if searching for tok and node

[thomaskrause]

ns:tok and ns:node should work correct but are ignored currently

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Imported from Launchpad using lp2gh.

• date created: 2011-06-09T09:03:51Z
• owner: krause
• the launchpad url was https://bugs.launchpad.net/bugs/794921

[thomaskrause]

Not sure if we actually want that anymore.