[doc] Describe connection types in more depth.
[doc] Describe connection types in more depth.

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