This adds the 'saddr:any' search class.  It contains all policies that have
a fixed saddr/prefixlen, but 'any' destination.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>