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.

(cherry picked from commit a8d1fe61f4a0d906d4086b71c88b0a3ab278b12c)
Reviewed-on: http://gerrit.openafs.org/3180
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
Change-Id: Ieaf8b87862a692559971b2a54882a485590a715d
Reviewed-on: http://gerrit.openafs.org/3827
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>