Clarify BIP0034 is supported in package doco.
Clarify BIP0034 is supported in package doco.

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