5b35b92 Break circular dependency: chain -> pow -> chain (Ben Woosley)
Pull request description:
chain.h does not actually depend on the methods defined in pow.h, just its include of consensus/params.h, which is standalone and can be included instead. Confirmed by inspection and successful build.
Tree-SHA512: fd2a182aad72c62ca54c9ac028d8f3f4416e4d0a5b8ed0a23fb52496d9291a6eeed5252f5e8b8ef4e47ca28bea3d2ed6ff3c41ddb92d102af02a895c9787100c
Backport of Core PR13234
https://github.com/bitcoin/bitcoin/pull/13234/