clientv3: connection retry and customizable endpoint selection
clientv3: connection retry and customizable endpoint selection

dannysauer/etcd,raoofm/etcd,achanda/etcd,sebrandon1/etcd,ravigadde/etcd,YuleiXiao/etcd,rchicoli/etcd,rchicoli/etcd,wantonsolutions/dinv-etcd,tguangch/etcd,mqliang/etcd,etcd-io/etcd,armstrongli/etcd,plasticbox/etcd,siddontang/etcd,bluebreezecf/etcd,swingbach/etcd,mkumatag/etcd,etcd-io/etcd,linuxcer/etcd,CrazyJvm/etcd,visheshnp/etcd,cockroachdb/etcd,coreos/etcd,raoofm/etcd,mkumatag/etcd,yudai/etcd,bluebreezecf/etcd,handsomesun/etcd,ajityagaty/etcd,hongchaodeng/etcd,nekto0n/etcd,li-ang/etcd,joshix/etcd,chipironcin/etcd,jlamillan/etcd,wantonsolutions/dinv-etcd,qqsun8819/etcd,handsomesun/etcd,swingbach/etcd,sinsharat/etcd,heyitsanthony/etcd,shawnps/etcd,YuleiXiao/etcd,tguangch/etcd,a-robinson/etcd,sofuture/etcd,bdarnell/etcd,xiang90/etcd,insequent/etcd,dnaeon/etcd,shawnps/etcd,mqliang/etcd,purpleidea/etcd,nekto0n/etcd,hongchaodeng/etcd,westhood/etcd,endocode/etcd,sofuture/etcd,qqsun8819/etcd,wantonsolutions/dinv-etcd,ktateish/etcd,bdarnell/etcd,OyTao/etcd_learning,yudai/etcd,glycerine/etcd,StorReduce/etcd,sebrandon1/etcd,a-robinson/etcd,lumjjb/etcd,gyuho/etcd,ajityagaty/etcd,OyTao/etcd_learning,westhood/etcd,rnaveiras/etcd,ajityagaty/etcd,coreos/etcd,vimalk78/etcd,glevand/coreos--etcd,lorneli/etcd,tamird/etcd,ravigadde/etcd,zaphod-concur/etcd,jonboulle/etcd,whuwxl/etcd,armstrongli/etcd,siddontang/etcd,mqliang/etcd,CrazyJvm/etcd,plasticbox/etcd,gyuho/etcd,mickep76/etcd,fanminshi/etcd,sinsharat/etcd,ktateish/etcd,heyitsanthony/etcd,jlamillan/etcd,insequent/etcd,cockroachdb/etcd,StorReduce/etcd,jonboulle/etcd,glycerine/etcd,etcd-io/etcd,achanda/etcd,akauppi/etcd,joshix/etcd,luxas/etcd,tamird/etcd,whuwxl/etcd,lumjjb/etcd,purpleidea/etcd,rnaveiras/etcd,dannysauer/etcd,endocode/etcd,mickep76/etcd,fanminshi/etcd,li-ang/etcd,vimalk78/etcd,xiang90/etcd,linuxcer/etcd,glevand/coreos--etcd,rnaveiras/etcd,luxas/etcd,zaphod-concur/etcd,dnaeon/etcd,lorneli/etcd,chipironcin/etcd,akauppi/etcd,mkumatag/etcd,visheshnp/etcd