Merge pull request #2049 from douglaz/run-clippy-fix

Run clippy fix

diff --cc lightning-background-processor/src/lib.rs
Simple merge

diff --cc lightning-block-sync/src/lib.rs
Simple merge

diff --cc lightning-invoice/src/payment.rs
Simple merge

diff --cc lightning-invoice/src/utils.rs
Simple merge

diff --cc lightning-rapid-gossip-sync/src/lib.rs
Simple merge