[doc] chain: Declare BLOCK_VALID_HEADER reserved
[doc] chain: Declare BLOCK_VALID_HEADER reserved

jonasschnelli/bitcoin,midnightmagic/bitcoin,monacoinproject/monacoin,lateminer/bitcoin,jamesob/bitcoin,peercoin/peercoin,ajtowns/bitcoin,gjhiggins/vcoincore,mruddy/bitcoin,tjps/bitcoin,instagibbs/bitcoin,jamesob/bitcoin,nikkitan/bitcoin,jlopp/statoshi,kallewoof/bitcoin,mruddy/bitcoin,ahmedbodi/vertcoin,tecnovert/particl-core,ahmedbodi/vertcoin,jlopp/statoshi,litecoin-project/litecoin,nikkitan/bitcoin,ElementsProject/elements,alecalve/bitcoin,DigitalPandacoin/pandacoin,Xekyo/bitcoin,fanquake/bitcoin,particl/particl-core,mm-s/bitcoin,alecalve/bitcoin,bitcoinknots/bitcoin,MarcoFalke/bitcoin,particl/particl-core,sipsorcery/bitcoin,qtumproject/qtum,domob1812/namecore,mitchellcash/bitcoin,jnewbery/bitcoin,n1bor/bitcoin,andreaskern/bitcoin,ElementsProject/elements,jamesob/bitcoin,namecoin/namecore,CryptArc/bitcoin,namecoin/namecoin-core,tecnovert/particl-core,AkioNak/bitcoin,jtimon/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,qtumproject/qtum,GroestlCoin/bitcoin,achow101/bitcoin,ahmedbodi/vertcoin,JeremyRubin/bitcoin,mm-s/bitcoin,midnightmagic/bitcoin,bitcoinsSG/bitcoin,pataquets/namecoin-core,rnicoll/bitcoin,ElementsProject/elements,fujicoin/fujicoin,n1bor/bitcoin,qtumproject/qtum,prusnak/bitcoin,jonasschnelli/bitcoin,mitchellcash/bitcoin,peercoin/peercoin,jlopp/statoshi,monacoinproject/monacoin,bitcoin/bitcoin,mitchellcash/bitcoin,pstratem/bitcoin,practicalswift/bitcoin,DigitalPandacoin/pandacoin,jlopp/statoshi,andreaskern/bitcoin,Sjors/bitcoin,instagibbs/bitcoin,instagibbs/bitcoin,midnightmagic/bitcoin,achow101/bitcoin,mruddy/bitcoin,FeatherCoin/Feathercoin,FeatherCoin/Feathercoin,ahmedbodi/vertcoin,bitcoinsSG/bitcoin,jambolo/bitcoin,pataquets/namecoin-core,EthanHeilman/bitcoin,dscotese/bitcoin,mm-s/bitcoin,mm-s/bitcoin,anditto/bitcoin,practicalswift/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,bitcoin/bitcoin,practicalswift/bitcoin,anditto/bitcoin,particl/particl-core,sstone/bitcoin,DigitalPandacoin/pandacoin,MarcoFalke/bitcoin,domob1812/bitcoin,GroestlCoin/bitcoin,GroestlCoin/bitcoin,MarcoFalke/bitcoin,apoelstra/bitcoin,domob1812/bitcoin,andreaskern/bitcoin,mm-s/bitcoin,dscotese/bitcoin,tjps/bitcoin,FeatherCoin/Feathercoin,gjhiggins/vcoincore,GroestlCoin/bitcoin,gjhiggins/vcoincore,alecalve/bitcoin,pstratem/bitcoin,dscotese/bitcoin,MeshCollider/bitcoin,namecoin/namecore,Sjors/bitcoin,qtumproject/qtum,practicalswift/bitcoin,namecoin/namecore,pstratem/bitcoin,GroestlCoin/GroestlCoin,gjhiggins/vcoincore,EthanHeilman/bitcoin,andreaskern/bitcoin,dscotese/bitcoin,Xekyo/bitcoin,wellenreiter01/Feathercoin,fujicoin/fujicoin,ajtowns/bitcoin,domob1812/bitcoin,dscotese/bitcoin,jamesob/bitcoin,gjhiggins/vcoincore,wellenreiter01/Feathercoin,sipsorcery/bitcoin,peercoin/peercoin,jambolo/bitcoin,jnewbery/bitcoin,nikkitan/bitcoin,wellenreiter01/Feathercoin,midnightmagic/bitcoin,domob1812/namecore,rnicoll/dogecoin,fujicoin/fujicoin,sstone/bitcoin,jnewbery/bitcoin,sstone/bitcoin,sstone/bitcoin,kallewoof/bitcoin,JeremyRubin/bitcoin,instagibbs/bitcoin,jonasschnelli/bitcoin,yenliangl/bitcoin,mitchellcash/bitcoin,cdecker/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,domob1812/bitcoin,jambolo/bitcoin,CryptArc/bitcoin,cdecker/bitcoin,vertcoin/vertcoin,sipsorcery/bitcoin,anditto/bitcoin,domob1812/namecore,peercoin/peercoin,EthanHeilman/bitcoin,MarcoFalke/bitcoin,Sjors/bitcoin,bitcoin/bitcoin,DigitalPandacoin/pandacoin,namecoin/namecore,sipsorcery/bitcoin,fanquake/bitcoin,jonasschnelli/bitcoin,litecoin-project/litecoin,CryptArc/bitcoin,Xekyo/bitcoin,pataquets/namecoin-core,ajtowns/bitcoin,EthanHeilman/bitcoin,bitcoin/bitcoin,n1bor/bitcoin,litecoin-project/litecoin,DigitalPandacoin/pandacoin,kallewoof/bitcoin,n1bor/bitcoin,AkioNak/bitcoin,rnicoll/bitcoin,litecoin-project/litecoin,pataquets/namecoin-core,ElementsProject/elements,ElementsProject/elements,sipsorcery/bitcoin,nikkitan/bitcoin,jamesob/bitcoin,mruddy/bitcoin,bitcoinknots/bitcoin,vertcoin/vertcoin,peercoin/peercoin,apoelstra/bitcoin,monacoinproject/monacoin,ahmedbodi/vertcoin,pataquets/namecoin-core,rnicoll/bitcoin,pstratem/bitcoin,CryptArc/bitcoin,fanquake/bitcoin,GroestlCoin/bitcoin,JeremyRubin/bitcoin,apoelstra/bitcoin,alecalve/bitcoin,domob1812/namecore,nikkitan/bitcoin,kallewoof/bitcoin,MeshCollider/bitcoin,jonasschnelli/bitcoin,jambolo/bitcoin,dscotese/bitcoin,gjhiggins/vcoincore,domob1812/bitcoin,anditto/bitcoin,vertcoin/vertcoin,prusnak/bitcoin,qtumproject/qtum,sstone/bitcoin,domob1812/namecore,GroestlCoin/GroestlCoin,FeatherCoin/Feathercoin,vertcoin/vertcoin,yenliangl/bitcoin,n1bor/bitcoin,EthanHeilman/bitcoin,yenliangl/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,pstratem/bitcoin,jamesob/bitcoin,bitcoinknots/bitcoin,namecoin/namecore,particl/particl-core,anditto/bitcoin,MeshCollider/bitcoin,tecnovert/particl-core,rnicoll/bitcoin,lateminer/bitcoin,nikkitan/bitcoin,jnewbery/bitcoin,bitcoinsSG/bitcoin,jambolo/bitcoin,mitchellcash/bitcoin,prusnak/bitcoin,instagibbs/bitcoin,fanquake/bitcoin,JeremyRubin/bitcoin,namecoin/namecoin-core,prusnak/bitcoin,mitchellcash/bitcoin,CryptArc/bitcoin,CryptArc/bitcoin,MarcoFalke/bitcoin,AkioNak/bitcoin,domob1812/namecore,tjps/bitcoin,bitcoinsSG/bitcoin,wellenreiter01/Feathercoin,tjps/bitcoin,namecoin/namecoin-core,tecnovert/particl-core,fujicoin/fujicoin,MeshCollider/bitcoin,bitcoinknots/bitcoin,rnicoll/bitcoin,qtumproject/qtum,AkioNak/bitcoin,ahmedbodi/vertcoin,JeremyRubin/bitcoin,prusnak/bitcoin,n1bor/bitcoin,jnewbery/bitcoin,GroestlCoin/bitcoin,achow101/bitcoin,sstone/bitcoin,anditto/bitcoin,qtumproject/qtum,FeatherCoin/Feathercoin,jtimon/bitcoin,EthanHeilman/bitcoin,litecoin-project/litecoin,practicalswift/bitcoin,namecoin/namecoin-core,jambolo/bitcoin,bitcoin/bitcoin,jtimon/bitcoin,ajtowns/bitcoin,rnicoll/dogecoin,bitcoinsSG/bitcoin,ElementsProject/elements,kallewoof/bitcoin,tecnovert/particl-core,DigitalPandacoin/pandacoin,cdecker/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,tecnovert/particl-core,GroestlCoin/GroestlCoin,monacoinproject/monacoin,fanquake/bitcoin,vertcoin/vertcoin,andreaskern/bitcoin,apoelstra/bitcoin,jtimon/bitcoin,lateminer/bitcoin,cdecker/bitcoin,wellenreiter01/Feathercoin,lateminer/bitcoin,alecalve/bitcoin,tjps/bitcoin,pataquets/namecoin-core,Xekyo/bitcoin,AkioNak/bitcoin,tjps/bitcoin,wellenreiter01/Feathercoin,particl/particl-core,namecoin/namecoin-core,domob1812/bitcoin,monacoinproject/monacoin,bitcoinsSG/bitcoin,Sjors/bitcoin,midnightmagic/bitcoin,cdecker/bitcoin,peercoin/peercoin,namecoin/namecore,rnicoll/dogecoin,fujicoin/fujicoin,GroestlCoin/GroestlCoin,FeatherCoin/Feathercoin,GroestlCoin/GroestlCoin,rnicoll/dogecoin,particl/particl-core,apoelstra/bitcoin,yenliangl/bitcoin,fanquake/bitcoin,MarcoFalke/bitcoin,bitcoinknots/bitcoin,JeremyRubin/bitcoin,cdecker/bitcoin,rnicoll/dogecoin,alecalve/bitcoin,vertcoin/vertcoin,jtimon/bitcoin,instagibbs/bitcoin,kallewoof/bitcoin,jlopp/statoshi,MeshCollider/bitcoin,MeshCollider/bitcoin,ajtowns/bitcoin,jtimon/bitcoin,yenliangl/bitcoin,litecoin-project/litecoin,mruddy/bitcoin,apoelstra/bitcoin,prusnak/bitcoin,midnightmagic/bitcoin,bitcoin/bitcoin,achow101/bitcoin,rnicoll/bitcoin,lateminer/bitcoin,monacoinproject/monacoin,ajtowns/bitcoin,pstratem/bitcoin,Sjors/bitcoin,achow101/bitcoin,AkioNak/bitcoin,practicalswift/bitcoin,achow101/bitcoin,mm-s/bitcoin,sipsorcery/bitcoin