pkg/proxy: silence http server logs
pkg/proxy: silence http server logs

Signed-off-by: Gyuho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

li-ang/etcd,bdarnell/etcd,etcd-io/etcd,mqliang/etcd,xiang90/etcd,mkumatag/etcd,bdarnell/etcd,gyuho/etcd,coreos/etcd,gyuho/etcd,li-ang/etcd,rnaveiras/etcd,mkumatag/etcd,dannysauer/etcd,etcd-io/etcd,rnaveiras/etcd,sinsharat/etcd,glevand/coreos--etcd,ajityagaty/etcd,rnaveiras/etcd,mqliang/etcd,xiang90/etcd,sebrandon1/etcd,vimalk78/etcd,etcd-io/etcd,cockroachdb/etcd,ajityagaty/etcd,vimalk78/etcd,sinsharat/etcd,joshix/etcd,glevand/coreos--etcd,mqliang/etcd,mkumatag/etcd,dannysauer/etcd,sebrandon1/etcd,joshix/etcd,cockroachdb/etcd,coreos/etcd,ajityagaty/etcd