net: improve code documentation for dns seed behaviour
net: improve code documentation for dns seed behaviour

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