p2p: refactor: tidy up `PeerManagerImpl::Misbehaving(...)`
p2p: refactor: tidy up `PeerManagerImpl::Misbehaving(...)`

- introduce constant variables `score_before` and
  `score_after` in order to improve readability
- deduplicate calls to LogPrint(), eliminates else-branch

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