documentation: Add authentication walkthrough with etcdctl. Fixes #2949
documentation: Add authentication walkthrough with etcdctl. Fixes #2949

jeremyeder/etcd,xychu/etcd,fasaxc/etcd,youxidev/etcd,dnaeon/etcd,honeyqa/etcd,glycerine/etcd,a-robinson/etcd,vimalk78/etcd,Timer/etcd,oscarrr110/etcd,hroyrh/etcd,elimisteve/etcd,SivagnanamCiena/etcd,cchamplin/etcd,joshix/etcd,jravetch/etcd,purpleidea/etcd,devfreesg/etcd,bluebreezecf/etcd,crandles/etcd,glevand/coreos--etcd,steveeJ/etcd,swingbach/etcd,hzy001/etcd,joshix/etcd,offscale/etcd,yudai/etcd,coreos/etcd,njharman/etcd,hroyrh/etcd,fanminshi/etcd,olark/etcd,wowsoso/etcd,Yhgenomics/etcd,whuwxl/etcd,xebitstudios/etcd,sebrandon1/etcd,yichengq/etcd,onlyjob/etcd,TheHippo/etcd,delkyd/etcd,tempbottle/etcd,jefby/etcd,svdata/etcd,snailwalker/etcd,tempbottle/etcd,wantonsolutions/dinv-etcd,YuleiXiao/etcd,handsomesun/etcd,hongbinz/etcd,Eagle-X/etcd,yyljlyy/etcd,msanterre/etcd,glycerine/etcd,tamird/etcd,jmptrader/etcd,mqliang/etcd,cockroachdb/etcd,zaphod-concur/etcd,etcd-io/etcd,sayden/etcd,onlyjob/etcd,cchamplin/etcd,xebitstudios/etcd,StorReduce/etcd,Winslett/etcd,mkumatag/etcd,combk8s/etcd,mkumatag/etcd,snailwalker/etcd,bspline/etcd,fasaxc/etcd,iamqizhao/etcd,zaphod-concur/etcd,offscale/etcd,oscarrr110/etcd,xiang90/etcd,rchicoli/etcd,OyTao/etcd_learning,westhood/etcd,shafreeck/etcd,sayden/etcd,ravigadde/etcd,Eagle-X/etcd,dalanlan/etcd,jchauncey/etcd,imzhulei/etcd,devfreesg/etcd,improbable-io/etcd,nkhare/etcd,honeyqa/etcd,li-ang/etcd,purpleidea/etcd,handsomesun/etcd,rnaveiras/etcd,jonboulle/etcd,elimisteve/etcd,spacejam/etcd,nekto0n/etcd,sebrandon1/etcd,delkyd/etcd,OyTao/etcd_learning,glevand/coreos--etcd,svdata/etcd,ajityagaty/etcd,heyitsanthony/etcd,akauppi/etcd,gouyang/etcd,gtank/etcd,Timer/etcd,lorneli/etcd,hongchaodeng/etcd,li-ang/etcd,jchauncey/etcd,bdarnell/etcd,fgbreel/etcd,ktateish/etcd,shawnps/etcd,arthurcolle/etcd,junxu/etcd,lzbgt/etcd,njharman/etcd,raoofm/etcd,siddontang/etcd,kkaneda/etcd,nekto0n/etcd,lumjjb/etcd,bdarnell/etcd,wantonsolutions/dinv-etcd,buaazp/etcd,hongbinz/etcd,qqsun8819/etcd,betawaffle/etcd,polvi/etcd,tangkun75/etcd,mike-lerch/etcd,dalanlan/etcd,xiang90/etcd,rnaveiras/etcd,sinsharat/etcd,combk8s/etcd,yyljlyy/etcd,hzy001/etcd,jeremyeder/etcd,njucslqq/etcd,lumjjb/etcd,princeqjzh/etcd,es-chow/etcd,etcd-io/etcd,siddontang/etcd,pauldallen/etcd,endocode/etcd,gityf/etcd,mickep76/etcd,giantswarm/etcd,jonboulle/etcd,dannysauer/etcd,nkhare/etcd,jlamillan/etcd,betawaffle/etcd,pauldallen/etcd,chipironcin/etcd,mqliang/etcd,gtank/etcd,wfxiang08/etcd,chenbaihu/etcd,olark/etcd,HideoYamauchi/etcd,luxas/etcd,TheHippo/etcd,sofuture/etcd,tguangch/etcd,beni55/etcd,wowsoso/etcd,StorReduce/etcd,tguangch/etcd,Yhgenomics/etcd,gityf/etcd,visheshnp/etcd,tangkun75/etcd,qqsun8819/etcd,ravigadde/etcd,lorneli/etcd,ajityagaty/etcd,dannysauer/etcd,xychu/etcd,a-robinson/etcd,princeqjzh/etcd,raoofm/etcd,chenbaihu/etcd,cockroachdb/etcd,rchicoli/etcd,gae123/etcd,fanminshi/etcd,visheshnp/etcd,rnaveiras/etcd,yudai/etcd,bluebreezecf/etcd,asim/etcd,plasticbox/etcd,openedbox/etcd,njucslqq/etcd,kingland/etcd,ajityagaty/etcd,wfxiang08/etcd,hongchaodeng/etcd,endocode/etcd,sebschrader/etcd,shakefu/etcd,achanda/etcd,insequent/etcd,fasaxc/etcd,arthurcolle/etcd,xdlinear/etcd,SivagnanamCiena/etcd,YuleiXiao/etcd,sinsharat/etcd,linuxcer/etcd,beni55/etcd,shakefu/etcd,jlamillan/etcd,mitake/etcd,CrazyJvm/etcd,giantswarm/etcd,vimalk78/etcd,gyuho/etcd,freeloop1114/etcd,freeloop1114/etcd,jmptrader/etcd,jefby/etcd,dnaeon/etcd,lzbgt/etcd,bspline/etcd,youxidev/etcd,achanda/etcd,plasticbox/etcd,cognusion/etcd,heyitsanthony/etcd,mickep76/etcd,openedbox/etcd,chipironcin/etcd,polvi/etcd,etcd-io/etcd,armstrongli/etcd,linuxcer/etcd,fgbreel/etcd,shafreeck/etcd,shawnps/etcd,insionng/etcd,swingbach/etcd,steveeJ/etcd,ktateish/etcd,kingland/etcd,insequent/etcd,axingblog/etcd,wantonsolutions/dinv-etcd,improbable-io/etcd,crandles/etcd,imzhulei/etcd,akauppi/etcd,Winslett/etcd,coreos/etcd,sofuture/etcd,mike-lerch/etcd,axingblog/etcd,buaazp/etcd,tamird/etcd,sebschrader/etcd,mqliang/etcd,CrazyJvm/etcd,junxu/etcd,gyuho/etcd,kkaneda/etcd,cognusion/etcd,luxas/etcd,westhood/etcd,mkumatag/etcd,jravetch/etcd,iamqizhao/etcd,whuwxl/etcd,es-chow/etcd,armstrongli/etcd,msanterre/etcd,spacejam/etcd,HideoYamauchi/etcd,gae123/etcd,asim/etcd,xdlinear/etcd,yichengq/etcd,gouyang/etcd,insionng/etcd,mitake/etcd