getinfo/getpeerinfo: add uuid fields.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
log: fix peer name.

Use *their* address, not ours!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
netaddr: make peer vs local addr explicit.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
getpeerinfo: return local and peer addresses, like bitcoind.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>