hostap.git contributions and Developer Certificate of Origin

[Jouni Malinen]

With the license terms having been cleaned up in the hostap.git files,
there is no continued need for the additional (e) item to explicitly
acknowledge BSD license option for contributions. Since DCO v1.1 is
now available from http://developercertificate.org/ it looks reasonable
to move to the unmodified version of DCO and to the commonly used
Signed-off-by tag for this project.

In other words, I've updated the CONTRIBUTIONS file to include a
reference to DCO v1.1 and move the Signed-hostap tag into the history
section. From now on, Signed-off-by tag can be used to acknowledge the
DCO terms similarly to number of other projects. There is no need to
update the pending contributions because of this, but for anything new,
I'd suggest using Signed-off-by.

-- 
Jouni Malinen                                            PGP id EFC895FA