doc: elaborate on release notes wrt netmasks
doc: elaborate on release notes wrt netmasks

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