etcdserver: update comments in a generated file
etcdserver: update comments in a generated file

On the latest master branch, etcdserver/etcdserverpb/etcdserver.pb.go
is changed when scripts/genproto.sh is executed. The content only has
changes for comment. Therefore it is not important but the change is
annoying when we update the proto file.

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