unkown => unknown

[flycoolman]

(11) p 8, sec 3.1.6. The "cursor" Query Parameter
Allowed Values
The allowed values are base64 encoded positions interpreted by the
server to index an element in the list, e.g. a list key or other
information to efficiently access the selected result-set. It is
an error to supply an unkown cursor for the working result-set,
and the "cursor-not-found" identity SHOULD be produced in the
error-app-tag in the error output when this occurs.
unkown => unknown.