Merge pull request #1178 from jkczyz/2021-11-payment-path-successful

Generate PaymentPathSuccessful event for each path

diff --cc fuzz/src/chanmon_consistency.rs
Simple merge

diff --cc lightning/src/ln/channelmanager.rs
Simple merge

diff --cc lightning/src/ln/functional_test_utils.rs
Simple merge

diff --cc lightning/src/ln/functional_tests.rs
Simple merge

diff --cc lightning/src/util/events.rs
Simple merge