consensus: log event to measure dueling proposers
consensus: log event to measure dueling proposers

ylong/doozerd,coreos/doozerd,magastzheng/doozerd,npchp110/doozerd,npchp110/doozerd,ha/doozerd,bitly/doozerd,zyxar/doozerd,zyxar/doozerd,bitly/doozerd,coreos/doozerd,jmptrader/doozerd,coreos/doozerd,zyxar/doozerd,ylong/doozerd,soundcloud/doozerd,soundcloud/doozerd,npchp110/doozerd,npchp110/doozer,rowhit/doozerd,magastzheng/doozerd,ylong/doozerd,ylong/doozerd,soundcloud/doozerd,magastzheng/doozerd,jmptrader/doozerd,magastzheng/doozerd,bitly/doozerd,rowhit/doozerd,ha/doozerd,tempbottle/doozerd,soundcloud/doozer,soundcloud/doozerd,ha/doozer,tempbottle/doozerd,coreos/doozer,rowhit/doozerd,jmptrader/doozerd,ha/doozerd,jmptrader/doozer,tempbottle/doozerd,jmptrader/doozerd,zyxar/doozerd,tempbottle/doozerd,npchp110/doozerd,soundcloud/doozer,rowhit/doozerd