MND-2: Explicitely mention file creation.

In order to avoid confusion about if a file is supposed to already exist
or not, this patch set changes occurences of "edit the ... file" to
"create the ... file and edit it" for non-existing files.

Change-Id: I0e2b11866084f68a341a611c7f7466bde090c9fa
Signed-off-by: Jan Hilberath <jan@midokura.com>