Do not allow name_to_handle_at, as we have already blocked open_by_handle_at
Do not allow name_to_handle_at, as we have already blocked open_by_handle_at

Being able to obtain a file handle is no use as we cannot perform
any operation in it, and it may leak kernel state.

Signed-off-by: Justin Cormack <af64ee19f04db9509cb02b0e470e11e5402ef9b3@unikernel.com>

aditirajagopal/docker,aditirajagopal/docker,aditirajagopal/docker