Updates msvc build to use ISO standard C++17.
Updates msvc build to use ISO standard C++17.

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