1. listpeers has a deprecated `"closer": null`, which we need
to handle in the schema, while trying not to damage our
documentation too much.
2. Don't print a condition if there are no fields to print.
3. Allow a special "untyped" marker for multifundchannel which returns
arbitrary JSON in a field.
4. Allow a single field return (for 'stop').
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This should be more robust in future: we SHA256 all of the deps.
For wiregen we prefix with EXPERIMENTAL_FEATURES, since it can effect them.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ChangeLog-Added: New `getsharedsecret` command, which lets you compute a shared secret with this node knowing only a public point. This implements the BOLT standard of hashing the ECDH point, and is incompatible with ECIES.
