[net processing] Refactor MaybeSendAddr() - early exits
[net processing] Refactor MaybeSendAddr() - early exits

Add early exit guard clauses if node.RelayAddrsWithConn() is false or if
current_time < node.m_next_addr_send. Add comments.

This commit leaves some lines over-indented. Those will be fixed in a
subsequent whitespace-only commit.

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