* Check mnemonic passphrase size in SetMnemonic instead of CreateWalletFromFile
* Move processing of cmd-line options and recovery via hdseed out of GenerateNewHDChain
* Implement GenerateNewHDChainEncrypted and tweak EncryptHDChain to be able to generate new encrypted HD chains in an already encrypted wallet
* rpc: Implement upgradetohd rpc
* Address review comments
* tweak rpc response
* tests: Test various non-HD to HD wallet upgrade paths
* Apply suggestions from code review
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
* Fix suggestions
* tests: Check upgradetohd return value
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
