Pull request ElementsProject/lightning#4364

Warning message support

6250
6254
6255
6269
6270
6272

Range Diff Matrix


6250..6254
6250..6255	6254..6255
6250..6269	6254..6269	6255..6269
6250..6270	6254..6270	6255..6270	6269..6270
6250..6272	6254..6272	6255..6272	6269..6272	6270..6272