flow: get the source and apply fieds correct in better_pipeline

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
flow: fix ethernet input parsing

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
flow: replies do not _require_ an IDENTIFIER

We do not need the IDENTIFIER in the reply message so rather
than abort lets just log it as warning and move on.

Also fix flowd so the identifier is sent correctly.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
flow: allow input with dot ip address notation for u32 types

More work is needed to get the pretty printers to "learn" some u32's
should be printed as integers and others as dot ip address. The
current plan is to create a print list of print types for flow to
use on known headers.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>