doc: update i2p.md with cjdns, improve local addresses section
doc: update i2p.md with cjdns, improve local addresses section

lateminer/bitcoin,mruddy/bitcoin,GroestlCoin/bitcoin,anditto/bitcoin,jlopp/statoshi,Xekyo/bitcoin,namecoin/namecore,AkioNak/bitcoin,namecoin/namecore,sipsorcery/bitcoin,dscotese/bitcoin,fanquake/bitcoin,AkioNak/bitcoin,anditto/bitcoin,andreaskern/bitcoin,ajtowns/bitcoin,sstone/bitcoin,bitcoinsSG/bitcoin,bitcoin/bitcoin,jamesob/bitcoin,dscotese/bitcoin,jambolo/bitcoin,tecnovert/particl-core,domob1812/bitcoin,fujicoin/fujicoin,ajtowns/bitcoin,sstone/bitcoin,instagibbs/bitcoin,particl/particl-core,fujicoin/fujicoin,instagibbs/bitcoin,mruddy/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,namecoin/namecoin-core,tecnovert/particl-core,bitcoinsSG/bitcoin,namecoin/namecore,sipsorcery/bitcoin,AkioNak/bitcoin,bitcoin/bitcoin,instagibbs/bitcoin,achow101/bitcoin,bitcoinsSG/bitcoin,namecoin/namecoin-core,jambolo/bitcoin,andreaskern/bitcoin,namecoin/namecoin-core,lateminer/bitcoin,GroestlCoin/bitcoin,jambolo/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,GroestlCoin/bitcoin,jambolo/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,andreaskern/bitcoin,instagibbs/bitcoin,dscotese/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,Xekyo/bitcoin,AkioNak/bitcoin,Xekyo/bitcoin,sstone/bitcoin,domob1812/bitcoin,lateminer/bitcoin,kallewoof/bitcoin,instagibbs/bitcoin,achow101/bitcoin,fanquake/bitcoin,andreaskern/bitcoin,jambolo/bitcoin,domob1812/bitcoin,jambolo/bitcoin,lateminer/bitcoin,jlopp/statoshi,kallewoof/bitcoin,sstone/bitcoin,fanquake/bitcoin,mruddy/bitcoin,Xekyo/bitcoin,ajtowns/bitcoin,bitcoin/bitcoin,tecnovert/particl-core,mruddy/bitcoin,particl/particl-core,ajtowns/bitcoin,anditto/bitcoin,AkioNak/bitcoin,jlopp/statoshi,Xekyo/bitcoin,namecoin/namecore,domob1812/bitcoin,fujicoin/fujicoin,sipsorcery/bitcoin,tecnovert/particl-core,namecoin/namecoin-core,jamesob/bitcoin,kallewoof/bitcoin,jlopp/statoshi,GroestlCoin/GroestlCoin,GroestlCoin/bitcoin,dscotese/bitcoin,domob1812/bitcoin,lateminer/bitcoin,mruddy/bitcoin,ajtowns/bitcoin,particl/particl-core,kallewoof/bitcoin,GroestlCoin/GroestlCoin,GroestlCoin/GroestlCoin,particl/particl-core,achow101/bitcoin,kallewoof/bitcoin,particl/particl-core,fujicoin/fujicoin,sipsorcery/bitcoin,anditto/bitcoin,bitcoin/bitcoin,jamesob/bitcoin,ajtowns/bitcoin,achow101/bitcoin,jlopp/statoshi,bitcoinsSG/bitcoin,instagibbs/bitcoin,fanquake/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,sstone/bitcoin,bitcoinsSG/bitcoin,sstone/bitcoin,sipsorcery/bitcoin,achow101/bitcoin,achow101/bitcoin,dscotese/bitcoin,jamesob/bitcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,bitcoin/bitcoin,bitcoin/bitcoin,fanquake/bitcoin,domob1812/bitcoin,kallewoof/bitcoin,AkioNak/bitcoin,namecoin/namecoin-core,GroestlCoin/GroestlCoin,anditto/bitcoin,jlopp/statoshi,namecoin/namecore,sipsorcery/bitcoin,fujicoin/fujicoin,namecoin/namecore,andreaskern/bitcoin,jamesob/bitcoin,jamesob/bitcoin,tecnovert/particl-core,dscotese/bitcoin,GroestlCoin/GroestlCoin,fanquake/bitcoin,anditto/bitcoin