lib: Add messaging_send_all

lib: Add messaging_send_all

This will replace message_send_all. With messaging_dgm_forall we have
a local broadcast mechanism, and ctdb can also broadcast
everywhere. So there's no need for a separate traverse/send mechanism.

There's no good error reporting mechanism for broadcasting, so make
this function void.

This drops the message_type filtering. I believe that this does not matter in
practice, since messaging is a lot cheaper with dgm instead of the old tdb
based messaging. If someone presents a use case where this matters, nowadays
I'd much rather extend the messaging_dgm lock file format (where the unique id
lives right now) with the filter bits.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>