Log an error when json encoding of peers.json fails.
Log an error when json encoding of peers.json fails.

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