395cef7 Change getmininginfo errors field to warnings (Andrew Chow)
8502b20 Unify help text for GetWarnings output in get*info RPCs (Andrew Chow)
f77f0e4 Add warnings field to getblockchaininfo (Andrew Chow)
Pull request description:
The `getblockchaininfo` output does not contain the `errors` field which the `getinfo`, `getmininginfo`, and `getnetworkinfo` RPCs have. It should have it as the errors pertain to the blockchain. This PR adds that field.
This PR also unifies the help text for the `errors` field and its output position so that all of the `get*info` commands are consistent.
`getnetworkinfo`'s `errors` field is named `warnings`. I did not change this even though it is inconsistent since this naming has been in use for a long time.
Tree-SHA512: 385ab6acfee67fc8816f4d51ab2bd7a623264c7973906dfbab0a171f199e9db16fde19093a5bc3dfbdd4ff5f19d2186b646eb6b3bae0a4d7c9add43650a4a9d9
Backport of PR10858
https://github.com/bitcoin/bitcoin/commit/9a8e9167f2636fdc2fc047dfed1747920b0f047f?diff=unified#diff-a0c8f511d90e83aa9b5857e819ced344R1165
Completes T567