backport PR10033 https://github.com/bitcoin/bitcoin/pull/10033/files
f490dae Trivial: Fix typo in key.h comment (Michael Goldstein)
Tree-SHA512: 4b79bfa88313d3558edb9ab1c6d27bd45659355e81f224ba75c05ff069ebae4c9f443efd70ae274814bbb7cca8a9057942b9b867055c48e93822ac73e38a51ce