Add checkpoint at block 250000.
Add checkpoint at block 250000.

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