net: correctly ban before the handshake is complete
net: correctly ban before the handshake is complete

coming from btc@c45b9fb54c5ca068a5e276c3bd6ebf4ae720f6f7

PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX