postgres_fdw and skip locked

Hi.

Now select ... for update ... [skip locked|nowait] options are not 
pushed down to remote servers. I see the only reason is that we can 
speak to pre-9.5 server, which doesn't understand skip locked option. 
Are there any other possible issues? Should we add foreign table option 
to control this behavior?

-- 
Best regards,
Alexander Pyhalov,
Postgres Professional