'rhash' is the old terminology, but 'payment_preimage' and
'payment_hash' were decided on for the BOLTs, so we should fix that here.
We still use rhash internally, but that's much easier to fix.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We intend to ultimately no longer use the legacy `daemon/lightningd`
and instead use `lightningd/lightningd`, so I grouped the new RPC and
the legacy RPC and implemented stubs for the new daemon.
Rusty Russell
Christian Decker
practicalswift
Konstantin Nick