Allow running rpc_bind.py --nonloopback test without IPv6
Allow running rpc_bind.py --nonloopback test without IPv6

achow101/bitcoin,midnightmagic/bitcoin,rnicoll/bitcoin,peercoin/peercoin,JeremyRubin/bitcoin,myriadteam/myriadcoin,cdecker/bitcoin,particl/particl-core,OmniLayer/omnicore,ahmedbodi/vertcoin,achow101/bitcoin,pataquets/namecoin-core,domob1812/namecore,mm-s/bitcoin,myriadcoin/myriadcoin,myriadcoin/myriadcoin,andreaskern/bitcoin,untrustbank/litecoin,tecnovert/particl-core,tjps/bitcoin,tecnovert/particl-core,mitchellcash/bitcoin,pataquets/namecoin-core,mm-s/bitcoin,cdecker/bitcoin,untrustbank/litecoin,ahmedbodi/vertcoin,Sjors/bitcoin,bitcoinknots/bitcoin,kallewoof/bitcoin,domob1812/bitcoin,myriadteam/myriadcoin,kallewoof/bitcoin,jonasschnelli/bitcoin,ElementsProject/elements,ajtowns/bitcoin,sipsorcery/bitcoin,bitcoinsSG/bitcoin,JeremyRubin/bitcoin,monacoinproject/monacoin,namecoin/namecoin-core,instagibbs/bitcoin,tjps/bitcoin,MeshCollider/bitcoin,mitchellcash/bitcoin,fanquake/bitcoin,alecalve/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,bitcoinsSG/bitcoin,n1bor/bitcoin,MeshCollider/bitcoin,vertcoin/vertcoin,bespike/litecoin,jnewbery/bitcoin,dscotese/bitcoin,jambolo/bitcoin,mruddy/bitcoin,gjhiggins/vcoincore,ElementsProject/elements,rnicoll/bitcoin,peercoin/peercoin,GroestlCoin/bitcoin,JeremyRubin/bitcoin,jtimon/bitcoin,peercoin/peercoin,bespike/litecoin,jtimon/bitcoin,bitcoin/bitcoin,prusnak/bitcoin,bitcoinknots/bitcoin,afk11/bitcoin,mruddy/bitcoin,sipsorcery/bitcoin,GroestlCoin/bitcoin,Xekyo/bitcoin,anditto/bitcoin,jamesob/bitcoin,litecoin-project/litecoin,dscotese/bitcoin,rnicoll/bitcoin,achow101/bitcoin,alecalve/bitcoin,OmniLayer/omnicore,midnightmagic/bitcoin,monacoinproject/monacoin,nikkitan/bitcoin,tjps/bitcoin,JeremyRubin/bitcoin,instagibbs/bitcoin,myriadcoin/myriadcoin,jtimon/bitcoin,EthanHeilman/bitcoin,ajtowns/bitcoin,jlopp/statoshi,gjhiggins/vcoincore,prusnak/bitcoin,tjps/bitcoin,myriadteam/myriadcoin,ahmedbodi/vertcoin,r8921039/bitcoin,midnightmagic/bitcoin,r8921039/bitcoin,ajtowns/bitcoin,jamesob/bitcoin,ElementsProject/elements,alecalve/bitcoin,particl/particl-core,wellenreiter01/Feathercoin,domob1812/bitcoin,kallewoof/bitcoin,lateminer/bitcoin,anditto/bitcoin,rnicoll/bitcoin,bitcoinsSG/bitcoin,CryptArc/bitcoin,ajtowns/bitcoin,gjhiggins/vcoincore,mitchellcash/bitcoin,jonasschnelli/bitcoin,particl/particl-core,EthanHeilman/bitcoin,qtumproject/qtum,particl/particl-core,vertcoin/vertcoin,mruddy/bitcoin,namecoin/namecore,FeatherCoin/Feathercoin,rnicoll/dogecoin,wellenreiter01/Feathercoin,myriadteam/myriadcoin,bitcoinsSG/bitcoin,GroestlCoin/bitcoin,cdecker/bitcoin,namecoin/namecoin-core,jtimon/bitcoin,GroestlCoin/GroestlCoin,n1bor/bitcoin,qtumproject/qtum,DigitalPandacoin/pandacoin,fujicoin/fujicoin,droark/bitcoin,andreaskern/bitcoin,rnicoll/bitcoin,rnicoll/dogecoin,namecoin/namecoin-core,sstone/bitcoin,afk11/bitcoin,ahmedbodi/vertcoin,dscotese/bitcoin,namecoin/namecore,Xekyo/bitcoin,domob1812/namecore,n1bor/bitcoin,OmniLayer/omnicore,mruddy/bitcoin,DigitalPandacoin/pandacoin,mitchellcash/bitcoin,domob1812/bitcoin,dscotese/bitcoin,MeshCollider/bitcoin,bitcoin/bitcoin,alecalve/bitcoin,JeremyRubin/bitcoin,nikkitan/bitcoin,apoelstra/bitcoin,rnicoll/dogecoin,anditto/bitcoin,litecoin-project/litecoin,GroestlCoin/bitcoin,DigitalPandacoin/pandacoin,CryptArc/bitcoin,tecnovert/particl-core,fujicoin/fujicoin,practicalswift/bitcoin,r8921039/bitcoin,jamesob/bitcoin,monacoinproject/monacoin,practicalswift/bitcoin,droark/bitcoin,FeatherCoin/Feathercoin,particl/particl-core,lateminer/bitcoin,monacoinproject/monacoin,anditto/bitcoin,AkioNak/bitcoin,fanquake/bitcoin,GroestlCoin/GroestlCoin,myriadteam/myriadcoin,fujicoin/fujicoin,instagibbs/bitcoin,vertcoin/vertcoin,rnicoll/bitcoin,MeshCollider/bitcoin,fujicoin/fujicoin,rnicoll/dogecoin,jnewbery/bitcoin,andreaskern/bitcoin,AkioNak/bitcoin,EthanHeilman/bitcoin,namecoin/namecore,EthanHeilman/bitcoin,jamesob/bitcoin,apoelstra/bitcoin,untrustbank/litecoin,bespike/litecoin,jtimon/bitcoin,bitcoin/bitcoin,droark/bitcoin,MarcoFalke/bitcoin,OmniLayer/omnicore,gjhiggins/vcoincore,qtumproject/qtum,achow101/bitcoin,litecoin-project/litecoin,MarcoFalke/bitcoin,monacoinproject/monacoin,jambolo/bitcoin,peercoin/peercoin,dscotese/bitcoin,monacoinproject/monacoin,gjhiggins/vcoincore,bitcoinsSG/bitcoin,pstratem/bitcoin,alecalve/bitcoin,cdecker/bitcoin,MarcoFalke/bitcoin,tecnovert/particl-core,FeatherCoin/Feathercoin,AkioNak/bitcoin,practicalswift/bitcoin,yenliangl/bitcoin,sipsorcery/bitcoin,domob1812/namecore,wellenreiter01/Feathercoin,mm-s/bitcoin,pataquets/namecoin-core,instagibbs/bitcoin,dscotese/bitcoin,lateminer/bitcoin,n1bor/bitcoin,nikkitan/bitcoin,untrustbank/litecoin,ahmedbodi/vertcoin,bitcoinknots/bitcoin,pstratem/bitcoin,ElementsProject/elements,AkioNak/bitcoin,r8921039/bitcoin,myriadcoin/myriadcoin,pstratem/bitcoin,pstratem/bitcoin,CryptArc/bitcoin,lateminer/bitcoin,sipsorcery/bitcoin,jtimon/bitcoin,Xekyo/bitcoin,sstone/bitcoin,namecoin/namecore,yenliangl/bitcoin,litecoin-project/litecoin,afk11/bitcoin,domob1812/namecore,GroestlCoin/bitcoin,OmniLayer/omnicore,andreaskern/bitcoin,untrustbank/litecoin,mm-s/bitcoin,midnightmagic/bitcoin,fanquake/bitcoin,alecalve/bitcoin,cdecker/bitcoin,cdecker/bitcoin,domob1812/bitcoin,practicalswift/bitcoin,nikkitan/bitcoin,andreaskern/bitcoin,bespike/litecoin,mm-s/bitcoin,bitcoinsSG/bitcoin,yenliangl/bitcoin,CryptArc/bitcoin,MarcoFalke/bitcoin,fujicoin/fujicoin,nikkitan/bitcoin,instagibbs/bitcoin,tecnovert/particl-core,bitcoinknots/bitcoin,namecoin/namecore,jonasschnelli/bitcoin,Sjors/bitcoin,jlopp/statoshi,ajtowns/bitcoin,mitchellcash/bitcoin,AkioNak/bitcoin,ahmedbodi/vertcoin,mm-s/bitcoin,prusnak/bitcoin,fanquake/bitcoin,DigitalPandacoin/pandacoin,andreaskern/bitcoin,myriadcoin/myriadcoin,domob1812/namecore,lateminer/bitcoin,bitcoin/bitcoin,domob1812/namecore,sstone/bitcoin,CryptArc/bitcoin,bitcoin/bitcoin,fanquake/bitcoin,myriadcoin/myriadcoin,vertcoin/vertcoin,anditto/bitcoin,jlopp/statoshi,apoelstra/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,rnicoll/dogecoin,afk11/bitcoin,DigitalPandacoin/pandacoin,ElementsProject/elements,achow101/bitcoin,tjps/bitcoin,r8921039/bitcoin,midnightmagic/bitcoin,particl/particl-core,mruddy/bitcoin,litecoin-project/litecoin,myriadteam/myriadcoin,qtumproject/qtum,qtumproject/qtum,wellenreiter01/Feathercoin,afk11/bitcoin,bespike/litecoin,lateminer/bitcoin,jambolo/bitcoin,r8921039/bitcoin,jonasschnelli/bitcoin,kallewoof/bitcoin,tjps/bitcoin,droark/bitcoin,MeshCollider/bitcoin,pataquets/namecoin-core,Sjors/bitcoin,ajtowns/bitcoin,sstone/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,yenliangl/bitcoin,prusnak/bitcoin,droark/bitcoin,instagibbs/bitcoin,JeremyRubin/bitcoin,afk11/bitcoin,wellenreiter01/Feathercoin,wellenreiter01/Feathercoin,namecoin/namecore,jlopp/statoshi,peercoin/peercoin,apoelstra/bitcoin,jambolo/bitcoin,jamesob/bitcoin,FeatherCoin/Feathercoin,yenliangl/bitcoin,litecoin-project/litecoin,n1bor/bitcoin,qtumproject/qtum,practicalswift/bitcoin,pataquets/namecoin-core,kallewoof/bitcoin,mitchellcash/bitcoin,jlopp/statoshi,sstone/bitcoin,domob1812/bitcoin,jnewbery/bitcoin,EthanHeilman/bitcoin,MeshCollider/bitcoin,apoelstra/bitcoin,Sjors/bitcoin,bitcoin/bitcoin,GroestlCoin/GroestlCoin,kallewoof/bitcoin,FeatherCoin/Feathercoin,droark/bitcoin,jnewbery/bitcoin,anditto/bitcoin,EthanHeilman/bitcoin,practicalswift/bitcoin,prusnak/bitcoin,MarcoFalke/bitcoin,vertcoin/vertcoin,OmniLayer/omnicore,peercoin/peercoin,jambolo/bitcoin,jonasschnelli/bitcoin,MarcoFalke/bitcoin,GroestlCoin/GroestlCoin,jnewbery/bitcoin,bespike/litecoin,jamesob/bitcoin,namecoin/namecoin-core,jlopp/statoshi,sipsorcery/bitcoin,ElementsProject/elements,jambolo/bitcoin,domob1812/bitcoin,achow101/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,untrustbank/litecoin,DigitalPandacoin/pandacoin,Xekyo/bitcoin,pstratem/bitcoin,midnightmagic/bitcoin,pataquets/namecoin-core,vertcoin/vertcoin,prusnak/bitcoin,Sjors/bitcoin,fujicoin/fujicoin,nikkitan/bitcoin,bitcoinknots/bitcoin,sipsorcery/bitcoin,Xekyo/bitcoin,namecoin/namecoin-core,CryptArc/bitcoin,gjhiggins/vcoincore,n1bor/bitcoin,GroestlCoin/GroestlCoin,pstratem/bitcoin,FeatherCoin/Feathercoin,GroestlCoin/bitcoin,sstone/bitcoin,fanquake/bitcoin,qtumproject/qtum