David A. Harding 74c144bbf4 CH04::bech32 and bech32m: add new sections ...

- Briefly mention segwit and the need for new addresses.  Mention that
  getting wallets to a new base58check version would probably be only a
  little less work than upgrading to an entirely new address format.
  Describe the problems with base58check and the solutions provide by
  bech32.  Illustrate some of the problems and solutions.

- Describe the bech32 length extension issue and provide an example.

- Introduce bech32m as the solution to the lengith extension issue.

- Provide examples using the bech32m reference library for Python for
  encoding and decoding a bech32m address (mentioning the backwards
  compatibility with bech32 addresses).

- Ask wallet authors to ensure they support forward compatibility with
  future segwit versions.

2023-02-09 20:58:47 -10:00

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