Merge #9853: Fix error codes from various RPCs
adaa281 Update release notes to include RPC error code changes. (John Newbery)
338bf06 Add commenting around JSON error codes (John Newbery)
dab804c Return correct error codes in fundrawtransaction(). (John Newbery)
a012087 Return correct error codes in setban(). (John Newbery)
960bc7f Return correct error codes in removeprunedfunds(). (John Newbery)
c119096 Return correct error codes in blockchain.cpp. (John Newbery)
6d07c62 Return correct error codes in bumpfee(). (John Newbery)
Tree-SHA512: 4bb39ad221cd8c83d98ac5d7ad642f3a8c265522720dc86b2eebc70e74439a85b06d6ddcd6a874e879d986511de3ab0878bb7fe58b50cb0546b78913632ea809