Improve InfoResult.
Improve InfoResult.

This commit modifies InfoResult to remove all of the omitempty tags since
the fields should be present in the marshalled JSON regardless of them
being zero values or not.

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