etcdctl/role: reject non-canonical permission path
etcdctl/role: reject non-canonical permission path

Non-canonical permission path is useless because the path received
by auth is always canonical, which is due to our ServeMux always
redirects request to canonical path().

This helps users to detect path permission setting error early.

Ref: http://godoc.org/net/http#ServeMux

akauppi/etcd,mkumatag/etcd,fgbreel/etcd,msanterre/etcd,elimisteve/etcd,heyitsanthony/etcd,betawaffle/etcd,Eagle-X/etcd,mike-lerch/etcd,cockroachdb/etcd,gouyang/etcd,improbable-io/etcd,xdlinear/etcd,fasaxc/etcd,westhood/etcd,jefby/etcd,jeremyeder/etcd,yudai/etcd,yyljlyy/etcd,whuwxl/etcd,rchicoli/etcd,purpleidea/etcd,qqsun8819/etcd,chipironcin/etcd,yudai/etcd,swingbach/etcd,snailwalker/etcd,mqliang/etcd,ajityagaty/etcd,SivagnanamCiena/etcd,etcd-io/etcd,gae123/etcd,xiang90/etcd,yichengq/etcd,buaazp/etcd,Winslett/etcd,gityf/etcd,delkyd/etcd,wowsoso/etcd,betawaffle/etcd,Eagle-X/etcd,endocode/etcd,sayden/etcd,sofuture/etcd,arthurcolle/etcd,kkaneda/etcd,CrazyJvm/etcd,xychu/etcd,dnaeon/etcd,bluebreezecf/etcd,tguangch/etcd,CrazyJvm/etcd,a-robinson/etcd,beni55/etcd,plasticbox/etcd,mkumatag/etcd,tamird/etcd,fasaxc/etcd,cchamplin/etcd,mqliang/etcd,Yhgenomics/etcd,tempbottle/etcd,Timer/etcd,gae123/etcd,iamqizhao/etcd,westhood/etcd,raoofm/etcd,li-ang/etcd,coreos/etcd,shakefu/etcd,pauldallen/etcd,endocode/etcd,snailwalker/etcd,msanterre/etcd,nekto0n/etcd,spacejam/etcd,chipironcin/etcd,li-ang/etcd,purpleidea/etcd,dnaeon/etcd,rchicoli/etcd,raoofm/etcd,gyuho/etcd,TheHippo/etcd,coreos/etcd,bdarnell/etcd,Timer/etcd,fanminshi/etcd,mickep76/etcd,StorReduce/etcd,lorneli/etcd,vimalk78/etcd,yichengq/etcd,imzhulei/etcd,asim/etcd,cognusion/etcd,xiang90/etcd,whuwxl/etcd,improbable-io/etcd,sebrandon1/etcd,handsomesun/etcd,freeloop1114/etcd,handsomesun/etcd,chenbaihu/etcd,kkaneda/etcd,svdata/etcd,njucslqq/etcd,YuleiXiao/etcd,jlamillan/etcd,mkumatag/etcd,hongchaodeng/etcd,bluebreezecf/etcd,HideoYamauchi/etcd,linuxcer/etcd,wantonsolutions/dinv-etcd,insequent/etcd,sebrandon1/etcd,joshix/etcd,vimalk78/etcd,tamird/etcd,glevand/coreos--etcd,beni55/etcd,visheshnp/etcd,plasticbox/etcd,gityf/etcd,armstrongli/etcd,mqliang/etcd,jonboulle/etcd,lumjjb/etcd,oscarrr110/etcd,shawnps/etcd,sofuture/etcd,rnaveiras/etcd,fasaxc/etcd,jlamillan/etcd,rnaveiras/etcd,qqsun8819/etcd,achanda/etcd,dannysauer/etcd,siddontang/etcd,cchamplin/etcd,njucslqq/etcd,mike-lerch/etcd,giantswarm/etcd,tguangch/etcd,onlyjob/etcd,freeloop1114/etcd,onlyjob/etcd,lumjjb/etcd,lorneli/etcd,shakefu/etcd,tempbottle/etcd,spacejam/etcd,delkyd/etcd,dannysauer/etcd,wowsoso/etcd,Winslett/etcd,yyljlyy/etcd,hroyrh/etcd,zaphod-concur/etcd,ktateish/etcd,cockroachdb/etcd,luxas/etcd,visheshnp/etcd,gyuho/etcd,hongchaodeng/etcd,buaazp/etcd,honeyqa/etcd,pauldallen/etcd,SivagnanamCiena/etcd,jchauncey/etcd,zaphod-concur/etcd,glevand/coreos--etcd,combk8s/etcd,wantonsolutions/dinv-etcd,cognusion/etcd,fgbreel/etcd,etcd-io/etcd,glycerine/etcd,mickep76/etcd,HideoYamauchi/etcd,xychu/etcd,armstrongli/etcd,oscarrr110/etcd,StorReduce/etcd,ravigadde/etcd,linuxcer/etcd,bdarnell/etcd,ajityagaty/etcd,sinsharat/etcd,gouyang/etcd,honeyqa/etcd,svdata/etcd,heyitsanthony/etcd,arthurcolle/etcd,achanda/etcd,etcd-io/etcd,TheHippo/etcd,chenbaihu/etcd,lzbgt/etcd,nekto0n/etcd,elimisteve/etcd,giantswarm/etcd,insequent/etcd,YuleiXiao/etcd,siddontang/etcd,wantonsolutions/dinv-etcd,iamqizhao/etcd,jchauncey/etcd,sinsharat/etcd,joshix/etcd,OyTao/etcd_learning,lzbgt/etcd,luxas/etcd,hroyrh/etcd,sayden/etcd,ravigadde/etcd,fanminshi/etcd,a-robinson/etcd,OyTao/etcd_learning,ajityagaty/etcd,akauppi/etcd,imzhulei/etcd,jonboulle/etcd,combk8s/etcd,shawnps/etcd,glycerine/etcd,jefby/etcd,hongbinz/etcd,jeremyeder/etcd,asim/etcd,Yhgenomics/etcd,rnaveiras/etcd,hongbinz/etcd,ktateish/etcd,swingbach/etcd,xdlinear/etcd