The help message for rpc logging includes:
In addition, the following are available as category names with special meanings:
- "all", "1" : represent all logging categories.
- "none", "0" : even if other logging categories are specified, ignore all of them.
However "none" is not currently recognized:
$ bitcoin/src/bitcoin-cli logging "[\"none\"]"
error code: -8
error message:
unknown logging category none
This patch adds the string "none" to match the help instructions.