21180ff Simplify return values of GetCoin/HaveCoin(InCache) (Pieter Wuille)
Tree-SHA512: eae0aa64fa1308191100cdc7cdc790c825f33b066c200a18b5895d7d5806cee1cc4caba1766ef3379a7cf93dde4bbae2bc9be92947935f5741f5c126d3ee991b
Backport of Core PR10581
https://github.com/bitcoin/bitcoin/pull/10581