Reduce default number of blocks to check at startup
Reduce default number of blocks to check at startup

Github-Pull: #8611
Rebased-From: 203f2121be0a84e85f7dff9cca9a30387005954f

HashUnlimited/Einsteinium-Unlimited,lbrtcoin/albertcoin,shaolinfry/litecoin,metacoin/florincoin,OmniLayer/omnicore,nlgcoin/guldencoin-official,experiencecoin/experiencecoin,oklink-dev/bitcoin,emc2foundation/einsteinium,Electronic-Gulden-Foundation/egulden,metacoin/florincoin,gjhiggins/vcoincore,emc2foundation/einsteinium,martindale/elements,magacoin/magacoin,zcoinofficial/zcoin,gravio-net/graviocoin,zcoinofficial/zcoin,OmniLayer/omnicore,emc2foundation/einsteinium,cannabiscoindev/cannabiscoin420,HashUnlimited/Einsteinium-Unlimited,okinc/bitcoin,reorder/viacoin,HashUnlimited/Einsteinium-Unlimited,zetacoin/zetacoin,bitcoinplusorg/xbcwalletsource,gravio-net/graviocoin,reorder/viacoin,ShadowMyst/creativechain-core,lbrtcoin/albertcoin,bdelzell/creditcoin-org-creditcoin,okinc/bitcoin,zcoinofficial/zcoin,emc2foundation/einsteinium,zcoinofficial/zcoin,zetacoin/zetacoin,martindale/elements,litecoin-project/litecore-litecoin,HashUnlimited/Einsteinium-Unlimited,gjhiggins/vcoincore,lbrtcoin/albertcoin,Electronic-Gulden-Foundation/egulden,zcoinofficial/zcoin,ShadowMyst/creativechain-core,OmniLayer/omnicore,magacoin/magacoin,shaolinfry/litecoin,experiencecoin/experiencecoin,magacoin/magacoin,lbrtcoin/albertcoin,metacoin/florincoin,HashUnlimited/Einsteinium-Unlimited,gjhiggins/vcoincore,litecoin-project/litecore-litecoin,lbrtcoin/albertcoin,zcoinofficial/zcoin,zetacoin/zetacoin,EntropyFactory/creativechain-core,martindale/elements,lbrtcoin/albertcoin,lbrtcoin/albertcoin,bdelzell/creditcoin-org-creditcoin,zetacoin/zetacoin,litecoin-project/litecore-litecoin,bitcoinplusorg/xbcwalletsource,reorder/viacoin,emc2foundation/einsteinium,oklink-dev/bitcoin,ShadowMyst/creativechain-core,martindale/elements,jl2012/litecoin,zetacoin/zetacoin,bdelzell/creditcoin-org-creditcoin,jl2012/litecoin,jl2012/litecoin,nlgcoin/guldencoin-official,shaolinfry/litecoin,HashUnlimited/Einsteinium-Unlimited,funkshelper/woodcore,cannabiscoindev/cannabiscoin420,bdelzell/creditcoin-org-creditcoin,zcoinofficial/zcoin,nlgcoin/guldencoin-official,itmanagerro/tresting,metacoin/florincoin,reorder/viacoin,Electronic-Gulden-Foundation/egulden,lbrtcoin/albertcoin,cannabiscoindev/cannabiscoin420,itmanagerro/tresting,EntropyFactory/creativechain-core,bdelzell/creditcoin-org-creditcoin,zcoinofficial/zcoin,ShadowMyst/creativechain-core,okinc/bitcoin,reorder/viacoin,gjhiggins/vcoincore,funkshelper/woodcore,bitcoinplusorg/xbcwalletsource,metacoin/florincoin,EntropyFactory/creativechain-core,bitcoinplusorg/xbcwalletsource,experiencecoin/experiencecoin,martindale/elements,Electronic-Gulden-Foundation/egulden,cannabiscoindev/cannabiscoin420,bitcoinplusorg/xbcwalletsource,bitcoinplusorg/xbcwalletsource,gravio-net/graviocoin,emc2foundation/einsteinium,oklink-dev/bitcoin,shaolinfry/litecoin,shaolinfry/litecoin,litecoin-project/litecore-litecoin,jl2012/litecoin,cannabiscoindev/cannabiscoin420,lbrtcoin/albertcoin,oklink-dev/bitcoin,gravio-net/graviocoin,oklink-dev/bitcoin,oklink-dev/bitcoin,reorder/viacoin,gjhiggins/vcoincore,bdelzell/creditcoin-org-creditcoin,gjhiggins/vcoincore,nlgcoin/guldencoin-official,itmanagerro/tresting,cannabiscoindev/cannabiscoin420,Electronic-Gulden-Foundation/egulden,shaolinfry/litecoin,metacoin/florincoin,lbrtcoin/albertcoin,EntropyFactory/creativechain-core,funkshelper/woodcore,nlgcoin/guldencoin-official,ShadowMyst/creativechain-core,lbrtcoin/albertcoin,itmanagerro/tresting,itmanagerro/tresting,okinc/bitcoin,zcoinofficial/zcoin,gravio-net/graviocoin,jl2012/litecoin,funkshelper/woodcore,itmanagerro/tresting,zcoinofficial/zcoin,gravio-net/graviocoin,experiencecoin/experiencecoin,experiencecoin/experiencecoin,funkshelper/woodcore,martindale/elements,okinc/bitcoin,magacoin/magacoin,OmniLayer/omnicore,EntropyFactory/creativechain-core,EntropyFactory/creativechain-core,OmniLayer/omnicore,zetacoin/zetacoin,jl2012/litecoin,Electronic-Gulden-Foundation/egulden,lbrtcoin/albertcoin,magacoin/magacoin,experiencecoin/experiencecoin,nlgcoin/guldencoin-official,litecoin-project/litecore-litecoin,okinc/bitcoin,ShadowMyst/creativechain-core,OmniLayer/omnicore,litecoin-project/litecore-litecoin,magacoin/magacoin