Convert errors in RPC server to new btcjson consts.
Convert errors in RPC server to new btcjson consts.

davecgh/btcd,1d4Nf6/btcd,Dirbaio/btcd,tb00/btcd,DanielKrawisz/btcd,dajohi/btcd,jrick/btcd,jcmincke/dcrd,btcsuitereleases/btcd,soapboxsys/ombfullnode,1d4Nf6/btcd,dajohi/btcd,CryptocurrencyCabal/htcd,qchain/btcd,Roasbeef/btcd,Evil-Coin/Evil,btcsuite/btcd,soapboxsys/ombfullnode,dan-da/btcd,DanielKrawisz/btcd,decred/dcrd,stevenroose/btcd,adiabat/btcd,cqswxj2013/btcd,davecgh/btcd,jrick/dcrd,wallclockbuilder/btcd,tb00/btcd,glv2/ppcd,sysbot/btcd,danoctavian/btcd,wallclockbuilder/btcd,btcsuitereleases/btcd,decred/dcrd,runeaune/btcd,Roasbeef/btcd,jrick/btcd,hectorj/btcd,Stash-Crypto/btcd,ppcsuite/ppcd-old,CryptocurrencyCabal/htcd,runeaune/btcd,qchain/btcd,cjepson/btcd,Stash-Crypto/btcd,sysbot/btcd,Cleawing/btcd,dan-da/btcd,ppcsuite/ppcd,jongillham/btcd,cjepson/btcd,jcmincke/dcrd,mathiasrw/btcd,btcsuite/btcd,ppcsuite/ppcd-old,stevenroose/btcd,danoctavian/btcd,FactomProject/btcd,cqswxj2013/btcd,adiabat/btcd,Dirbaio/btcd,ltcsuite/ltcd,aakselrod/btcd,jrick/dcrd,pkothbauer/btcd,mathiasrw/btcd,hectorj/btcd,jimmysong/btcd,jongillham/btcd,toddfries/btcd,jrick/btcd,aakselrod/btcd,Cleawing/btcd,BitGo/prova,glv2/ppcd,FactomProject/btcd,ppcsuite/ppcd,pkothbauer/btcd,BitGo/prova,jimmysong/btcd,jcmincke/dcrd,dajohi/btcd,Evil-Coin/Evil,Dirbaio/btcd,toddfries/btcd,ltcsuite/ltcd