rpc: simplify/constify getnodeaddresses code
rpc: simplify/constify getnodeaddresses code

sstone/bitcoin,bitcoin/bitcoin,qtumproject/qtum,ElementsProject/elements,jlopp/statoshi,ajtowns/bitcoin,dscotese/bitcoin,jlopp/statoshi,jambolo/bitcoin,GroestlCoin/GroestlCoin,bitcoin/bitcoin,Xekyo/bitcoin,apoelstra/bitcoin,particl/particl-core,lateminer/bitcoin,namecoin/namecoin-core,bitcoinsSG/bitcoin,mm-s/bitcoin,ElementsProject/elements,sstone/bitcoin,namecoin/namecoin-core,namecoin/namecoin-core,achow101/bitcoin,bitcoinsSG/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,tecnovert/particl-core,mruddy/bitcoin,jamesob/bitcoin,qtumproject/qtum,jamesob/bitcoin,rnicoll/bitcoin,tecnovert/particl-core,lateminer/bitcoin,domob1812/bitcoin,yenliangl/bitcoin,sstone/bitcoin,dscotese/bitcoin,prusnak/bitcoin,fujicoin/fujicoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,bitcoinknots/bitcoin,fujicoin/fujicoin,fujicoin/fujicoin,particl/particl-core,MarcoFalke/bitcoin,rnicoll/bitcoin,lateminer/bitcoin,domob1812/namecore,MarcoFalke/bitcoin,Xekyo/bitcoin,mm-s/bitcoin,mruddy/bitcoin,kallewoof/bitcoin,JeremyRubin/bitcoin,mm-s/bitcoin,pataquets/namecoin-core,lateminer/bitcoin,namecoin/namecore,anditto/bitcoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,prusnak/bitcoin,achow101/bitcoin,domob1812/namecore,sipsorcery/bitcoin,namecoin/namecore,sipsorcery/bitcoin,qtumproject/qtum,Xekyo/bitcoin,fanquake/bitcoin,jamesob/bitcoin,domob1812/namecore,GroestlCoin/GroestlCoin,jlopp/statoshi,MarcoFalke/bitcoin,dscotese/bitcoin,kallewoof/bitcoin,sstone/bitcoin,prusnak/bitcoin,MarcoFalke/bitcoin,fujicoin/fujicoin,pataquets/namecoin-core,sstone/bitcoin,rnicoll/bitcoin,namecoin/namecoin-core,mm-s/bitcoin,ajtowns/bitcoin,andreaskern/bitcoin,bitcoin/bitcoin,GroestlCoin/bitcoin,jlopp/statoshi,fanquake/bitcoin,andreaskern/bitcoin,jlopp/statoshi,dscotese/bitcoin,MarcoFalke/bitcoin,fanquake/bitcoin,achow101/bitcoin,GroestlCoin/bitcoin,domob1812/bitcoin,JeremyRubin/bitcoin,Xekyo/bitcoin,instagibbs/bitcoin,yenliangl/bitcoin,yenliangl/bitcoin,domob1812/namecore,sipsorcery/bitcoin,fanquake/bitcoin,yenliangl/bitcoin,particl/particl-core,jlopp/statoshi,kallewoof/bitcoin,anditto/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,achow101/bitcoin,Xekyo/bitcoin,qtumproject/qtum,bitcoinsSG/bitcoin,jambolo/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,rnicoll/bitcoin,ElementsProject/elements,rnicoll/bitcoin,tecnovert/particl-core,pataquets/namecoin-core,ElementsProject/elements,jambolo/bitcoin,namecoin/namecore,ElementsProject/elements,fujicoin/fujicoin,rnicoll/bitcoin,AkioNak/bitcoin,particl/particl-core,domob1812/namecore,GroestlCoin/bitcoin,sipsorcery/bitcoin,achow101/bitcoin,tecnovert/particl-core,andreaskern/bitcoin,achow101/bitcoin,bitcoinknots/bitcoin,mruddy/bitcoin,anditto/bitcoin,tecnovert/particl-core,tecnovert/particl-core,bitcoin/bitcoin,domob1812/bitcoin,jamesob/bitcoin,AkioNak/bitcoin,ajtowns/bitcoin,bitcoin/bitcoin,kallewoof/bitcoin,namecoin/namecoin-core,MarcoFalke/bitcoin,anditto/bitcoin,namecoin/namecore,anditto/bitcoin,instagibbs/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,yenliangl/bitcoin,andreaskern/bitcoin,apoelstra/bitcoin,pataquets/namecoin-core,apoelstra/bitcoin,apoelstra/bitcoin,prusnak/bitcoin,JeremyRubin/bitcoin,fujicoin/fujicoin,sipsorcery/bitcoin,GroestlCoin/bitcoin,domob1812/namecore,GroestlCoin/GroestlCoin,AkioNak/bitcoin,instagibbs/bitcoin,qtumproject/qtum,bitcoinsSG/bitcoin,AkioNak/bitcoin,domob1812/bitcoin,jambolo/bitcoin,instagibbs/bitcoin,qtumproject/qtum,dscotese/bitcoin,jambolo/bitcoin,particl/particl-core,fanquake/bitcoin,mruddy/bitcoin,bitcoinknots/bitcoin,namecoin/namecoin-core,lateminer/bitcoin,bitcoinknots/bitcoin,dscotese/bitcoin,sipsorcery/bitcoin,sstone/bitcoin,AkioNak/bitcoin,ajtowns/bitcoin,apoelstra/bitcoin,ajtowns/bitcoin,prusnak/bitcoin,andreaskern/bitcoin,instagibbs/bitcoin,anditto/bitcoin,GroestlCoin/bitcoin,kallewoof/bitcoin,GroestlCoin/bitcoin,JeremyRubin/bitcoin,andreaskern/bitcoin,domob1812/bitcoin,pataquets/namecoin-core,prusnak/bitcoin,qtumproject/qtum,namecoin/namecore,kallewoof/bitcoin,ElementsProject/elements,jambolo/bitcoin,apoelstra/bitcoin,mruddy/bitcoin,bitcoinknots/bitcoin,namecoin/namecore,fanquake/bitcoin,AkioNak/bitcoin,JeremyRubin/bitcoin,instagibbs/bitcoin,bitcoinsSG/bitcoin,jamesob/bitcoin,mruddy/bitcoin,GroestlCoin/GroestlCoin,jamesob/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin