6c914ac [wallet] Securely erase potentially sensitive keys/values (Thomas Snider)
Tree-SHA512: 071d88c4093108d4e4eced35a6ffcebe3f499798194f5b1be661ffa5b78b5f55311667f6d2a72758d85290f61f958381ee95d380b9045ca18e9e1875f0e686c8
Backport Core PR10308
https://github.com/bitcoin/bitcoin/pull/10308/files