This PR builds on #17578 (now merged) and deprecates the rpc getaddressinfo label
field. The deprecated behavior can be re-enabled by starting bitcoind with -deprecatedrpc=label
.
See http://www.erisian.com.au/bitcoin-core-dev/log-2019-11-22.html#l-622 and #17283 (comment) for more context.
Reviewers: This PR may be tested manually by building, then running bitcoind with and without the -deprecatedrpc=label
flag while verifying the rpc getaddressinfo output and help text.
Next step: add support for multiple labels.