merge ntops and namei

merge ntops and namei

instead of having 2 implementations of nearly the same thing,
merge what we can. this can get closer, probably, but this is
a start.

Change-Id: I8446649e37ab0856e6e40933a44a35edbc708638
Reviewed-on: http://gerrit.openafs.org/3180
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>