4284deed29 DerivationPath: support 'h' in Display output for hardened components (vicjuma)
Pull request description:
DerivationPath now supports a display format using both 'h' a single quote (') to indicate hardened components.
This aligns it with its ChildNumber's output style.
Resolves: #4618
ACKs for top commit:
apoelstra:
ACK 4284deed29114c5e31ef7c29e28e352b860f74e7; successfully ran local tests
tcharding:
ACK 4284deed29
Tree-SHA512: 24e053c22ec94b851935debbab83d15ad9f41ccfca0a7c34a061450989b176295512e8ffb187b2a54c6c6926f82ec7e4a4186ccdba2ec2616a6e0603d90d2a9b