8afb166 Update documentation to incude origin information (Pieter Wuille)
ff37459 Add tests for key origin support (Pieter Wuille)
2c6281f Add key origin support to descriptors (Pieter Wuille)

Pull request description:

  This adds support for [key origin](https://gist.github.com/sipa/e3d23d498c430bb601c5bca83523fa82#key-origin-identification) information to the descriptor parser, and exposes the resulting key path information through `FlatSigningProvider`.

  There is no observable functionality from this right now, except having the `scantxoutset` RPC accept descriptors that include key origin information.

  Longer term this feature helps with a potential descriptors-based walletless PSBT updater, or for importing hardware wallet xpubs (once the wallet can import descriptors).

Tree-SHA512: 399828127b2e90a2f32d81ecc30a8a9261d08f4182d5d1744f05e46b25fde1bd383c54835b0820ca668e7d17353fa92c0fb2987e211ce269e0824c9395d210c2

0a8aa62 refactor: Make HexStr take a span (Wladimir J. van der Laan)

Pull request description:

  Make `HexSt`r take a span of bytes, instead of an awkward pair of templated iterators. This simplifies most of the uses.

ACKs for top commit:
  elichai:
    Code review ACK 0a8aa62
  hebasto:
    re-ACK 0a8aa62
  jonatack:
    re-ACK 0a8aa62

Tree-SHA512: 6e178ece5cbac62119c857a10299b1e85422938084c3f03063e17119a5129e0c28016e05a6fabaa4c271a7e0a37c7cd89fa47c435ee19b38a5acfe80d00de992

…portmulti

cb3511b Add release notes for importing key origin info change (Andrew Chow)
4c75a69 Test importing descriptors with key origin information (Andrew Chow)
02d6586 Import KeyOriginData when importing descriptors (Andrew Chow)
3d235df Implement a function to add KeyOriginInfo to a wallet (Andrew Chow)
eab63bc Store key origin info in key metadata (Andrew Chow)
345bff6 Remove hdmasterkeyid (Andrew Chow)
bac8c67 Add a method to CWallet to write just CKeyMetadata (Andrew Chow)
e7652d3 Add WriteHDKeypath function and move *HDKeypath to util/bip32.{h,cpp} (Andrew Chow)
c45415f Refactor keymetadata writing to a separate method (Andrew Chow)

Pull request description:

  This PR allows for key origin data as defined by the descriptors document to be imported to the wallet when importing a descriptor using `importmulti`. This allows the `walletprocesspsbt` to include the BIP 32 derivation paths for keys that it is watching that are from a different HD wallet.

  In order to make this easier to use, a new field `hdmasterkeyfingerprint` has been added to `getaddressinfo`. Additionally I have removed `hdmasterkeyid` as was planned. I think that this API change is fine since it was going to be removed in 0.18 anyways. `CKeyMetadata` has also been extended to store key origin info to facilitate this.

Tree-SHA512: 9c7794f3c793da57e23c5abbdc3d58779ee9dea3d53168bb86c0643a4ad5a11a446264961e2f772f35eea645048cb60954ed58050002caee4e43cd9f51215097

…portmulti (add)