b2a7d7023c Rename XpubIdentifier to XKeyIdentifier (Tobin C. Harding)
ffd2466ad1 Move XpubIdentifier to the bip32 module (Tobin C. Harding)
Pull request description:
- Patch 1: Move the hash to the `bip32` module where it is used, as we have done with other hashes recently (and re-export it at crate root).
- Patch 2: Rename the hash to `XKeyIdentifier` as discussed in #2014Fix: #2014
ACKs for top commit:
apoelstra:
ACK b2a7d7023c
Tree-SHA512: 5efa9fc857c71e506263bf6adee3b4294f22838d5b119177c9108c69191d545338c11a4796bc95e956a67f3418010725f3d12c06d2c4c3bb5cf038d59976ae0f