Pull request ElementsProject/lightning#4559

Fix closing hang when expecting final revoke_and_ack

6791
6792
6795
6796
6797
6889
6909
6918
6919
6958

Range Diff Matrix


6791..6792
6791..6795	6792..6795
6791..6796	6792..6796	6795..6796
6791..6797	6792..6797	6795..6797	6796..6797
6791..6889	6792..6889	6795..6889	6796..6889	6797..6889
6791..6909	6792..6909	6795..6909	6796..6909	6797..6909	6889..6909
6791..6918	6792..6918	6795..6918	6796..6918	6797..6918	6889..6918	6909..6918
6791..6919	6792..6919	6795..6919	6796..6919	6797..6919	6889..6919	6909..6919	6918..6919
6791..6958	6792..6958	6795..6958	6796..6958	6797..6958	6889..6958	6909..6958	6918..6958	6919..6958