fa912a8ad5a94cd2bdc149400b1befb346621f03 doc: move-only ActivateBestChain doxygen comment to header (MarcoFalke)
fa99efd054c57cd6717391f9ae8ce32b06986ff8 doc: ActivateBestChainStep return value (MarcoFalke)
Pull request description:
It will always return true, unless a system error such as #15305 occurred
ACKs for top commit:
laanwj:
ACK fa912a8ad5a94cd2bdc149400b1befb346621f03
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Backport of Core PR16757