embed: fix HTTPs + DNS SRV discovery
embed: fix HTTPs + DNS SRV discovery

akauppi/etcd,lorneli/etcd,gyuho/etcd,bluebreezecf/etcd,glevand/coreos--etcd,akauppi/etcd,sebrandon1/etcd,rnaveiras/etcd,YuleiXiao/etcd,gyuho/etcd,mkumatag/etcd,lorneli/etcd,sinsharat/etcd,ajityagaty/etcd,cockroachdb/etcd,dannysauer/etcd,ajityagaty/etcd,etcd-io/etcd,coreos/etcd,rnaveiras/etcd,heyitsanthony/etcd,vimalk78/etcd,etcd-io/etcd,bdarnell/etcd,fanminshi/etcd,mkumatag/etcd,cockroachdb/etcd,vimalk78/etcd,glevand/coreos--etcd,mkumatag/etcd,whuwxl/etcd,xiang90/etcd,joshix/etcd,rnaveiras/etcd,etcd-io/etcd,dannysauer/etcd,heyitsanthony/etcd,bluebreezecf/etcd,mqliang/etcd,sinsharat/etcd,sebrandon1/etcd,li-ang/etcd,li-ang/etcd,ajityagaty/etcd,mqliang/etcd,mqliang/etcd,coreos/etcd,xiang90/etcd,fanminshi/etcd,whuwxl/etcd,joshix/etcd,bdarnell/etcd,YuleiXiao/etcd