1102d8063e
We have the issue of aliases: xpay uses scids like 0x0x0 for routehints and blinded paths, and then can apply reservations to them. But generally, reservations are *global*, so we need to differentiate. Changelog-Added: Plugins: `askrene-reserve` and `askrene-unreserve` can take an optional `layer` inside `path` elements. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>