doc: Change doxygen URL to doxygen.bitcoincore.org
doc: Change doxygen URL to doxygen.bitcoincore.org

The bitcoin core doxygen documentation has moved to
https://doxygen.bitcoincore.org, see
bitcoin-core/bitcoincore.org#681

(the old URL still works as a redirect)

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