Avoid copying undo data
Apply clang-format on some infrequently-updated files
Merge pull request #4835

ab15b2e Avoid copying undo data (Pieter Wuille)
test: Fix DoS tests after c74332c

Fix data structure mismatch ... The mind boggles that they were still passing at all.
Merge pull request #4933

20e01b1 Apply clang-format on some infrequently-updated files (Pieter Wuille)
Merge pull request #4950

33a2771 test: Fix DoS tests after c74332c (Wladimir J. van der Laan)