doc: add max wal/snap flags
doc: add max wal/snap flags

mqliang/etcd,visheshnp/etcd,YuleiXiao/etcd,combk8s/etcd,chenbaihu/etcd,dalanlan/etcd,imzhulei/etcd,combk8s/etcd,lorneli/etcd,hongchaodeng/etcd,polvi/etcd,freeloop1114/etcd,bdarnell/etcd,TheHippo/etcd,bdarnell/etcd,linuxcer/etcd,devfreesg/etcd,vimalk78/etcd,dnaeon/etcd,sebschrader/etcd,OyTao/etcd_learning,offscale/etcd,snailwalker/etcd,xueshanf/etcd,sayden/etcd,coreos/etcd,StorReduce/etcd,Eagle-X/etcd,elimisteve/etcd,westhood/etcd,giantswarm/etcd,bakins/etcd,heyitsanthony/etcd,arthurcolle/etcd,OyTao/etcd_learning,crandles/etcd,rchicoli/etcd,devfreesg/etcd,gyuho/etcd,jonboulle/etcd,hongbinz/etcd,tguangch/etcd,msanterre/etcd,xiang90/etcd,openedbox/etcd,xueshanf/etcd,fgbreel/etcd,siddontang/etcd,mwitkow/etcd,snailwalker/etcd,polvi/etcd,sinsharat/etcd,rnaveiras/etcd,shakefu/etcd,barakmich/etcd,glevand/coreos--etcd,dnaeon/etcd,mischief/etcd,honeyqa/etcd,whuwxl/etcd,pauldallen/etcd,youxidev/etcd,cchamplin/etcd,sebschrader/etcd,whuwxl/etcd,steveeJ/etcd,yichengq/etcd,akauppi/etcd,openedbox/etcd,plasticbox/etcd,achanda/etcd,Yhgenomics/etcd,yyljlyy/etcd,insionng/etcd,svdata/etcd,qiaochao911/etcd,rnaveiras/etcd,jlamillan/etcd,crandles/etcd,gouyang/etcd,SivagnanamCiena/etcd,mqliang/etcd,mgoelzer/etcd-fork2,njharman/etcd,etcd-io/etcd,ravigadde/etcd,tempbottle/etcd,tguangch/etcd,spacejam/etcd,ktateish/etcd,honeyqa/etcd,jchauncey/etcd,gtank/etcd,glensc/etcd,YuleiXiao/etcd,Yhgenomics/etcd,steveeJ/etcd,axingblog/etcd,wowsoso/etcd,justintung/etcd,oscarrr110/etcd,etcd-io/etcd,robszumski/etcd,kkaneda/etcd,axingblog/etcd,wowsoso/etcd,offscale/etcd,svdata/etcd,jravetch/etcd,kingland/etcd,chenbaihu/etcd,bluebreezecf/etcd,wfxiang08/etcd,shawnps/etcd,luxas/etcd,jchauncey/etcd,gityf/etcd,raoofm/etcd,li-ang/etcd,mgoelzer/etcd-fork2,cognusion/etcd,fasaxc/etcd,mkumatag/etcd,gae123/etcd,yifan-gu/etcd,xebitstudios/etcd,mischief/etcd,ravigadde/etcd,achanda/etcd,gae123/etcd,justintung/etcd,glycerine/etcd,tamird/etcd,iamqizhao/etcd,westhood/etcd,fanminshi/etcd,robszumski/etcd,shawnps/etcd,chai2010/etcd,asim/etcd,wantonsolutions/dinv-etcd,a-robinson/etcd,Winslett/etcd,hpcloud/etcd,es-chow/etcd,Timer/etcd,coreos/etcd,jeremyeder/etcd,delkyd/etcd,improbable-io/etcd,hpcloud/etcd,hroyrh/etcd,pengzj/etcd,mickep76/etcd,cchamplin/etcd,mwitkow-io/etcd,swingbach/etcd,wantonsolutions/dinv-etcd,akauppi/etcd,kingland/etcd,imzhulei/etcd,ajityagaty/etcd,njucslqq/etcd,joshix/etcd,qqsun8819/etcd,xebitstudios/etcd,xiang90/etcd,dannysauer/etcd,lzbgt/etcd,purpleidea/etcd,gyuho/etcd,kkaneda/etcd,handsomesun/etcd,dalanlan/etcd,li-ang/etcd,a-robinson/etcd,QuantiumTechnology/etcd,buaazp/etcd,jonboulle/etcd,beni55/etcd,es-chow/etcd,onlyjob/etcd,heyitsanthony/etcd,freeloop1114/etcd,armstrongli/etcd,QuantiumTechnology/etcd,princeqjzh/etcd,linuxcer/etcd,sayden/etcd,dannysauer/etcd,ecnahc515/etcd,hroyrh/etcd,spacejam/etcd,fasaxc/etcd,StorReduce/etcd,buaazp/etcd,cognusion/etcd,lzbgt/etcd,cockroachdb/etcd,shafreeck/etcd,lumjjb/etcd,hzy001/etcd,visheshnp/etcd,nieanan/etcd,siddontang/etcd,cockroachdb/etcd,mkumatag/etcd,junxu/etcd,mkumatag/etcd,mitake/etcd,fasaxc/etcd,tangkun75/etcd,asim/etcd,ajityagaty/etcd,njucslqq/etcd,sinsharat/etcd,csuideal/etcd,yudai/etcd,msanterre/etcd,tangkun75/etcd,wantonsolutions/dinv-etcd,tempbottle/etcd,insequent/etcd,xdlinear/etcd,jmptrader/etcd,junxu/etcd,sebrandon1/etcd,youxidev/etcd,improbable-io/etcd,CrazyJvm/etcd,sofuture/etcd,pauldallen/etcd,Eagle-X/etcd,wfxiang08/etcd,qqsun8819/etcd,oscarrr110/etcd,armstrongli/etcd,bakins/etcd,mqliang/etcd,shakefu/etcd,insequent/etcd,jmptrader/etcd,gityf/etcd,luxas/etcd,hzy001/etcd,barakmich/etcd,sebrandon1/etcd,insionng/etcd,xychu/etcd,Winslett/etcd,nekto0n/etcd,zaphod-concur/etcd,chipironcin/etcd,mickep76/etcd,plasticbox/etcd,HideoYamauchi/etcd,nkhare/etcd,giantswarm/etcd,lorneli/etcd,csuideal/etcd,zaphod-concur/etcd,gosharplite/etcd,delkyd/etcd,tamird/etcd,etcd-io/etcd,glensc/etcd,beni55/etcd,xychu/etcd,ylong/etcd,rchicoli/etcd,olark/etcd,olark/etcd,princeqjzh/etcd,bluebreezecf/etcd,endocode/etcd,nieanan/etcd,elimisteve/etcd,hongbinz/etcd,xdlinear/etcd,bspline/etcd,mike-lerch/etcd,jlamillan/etcd,TheHippo/etcd,ecnahc515/etcd,glycerine/etcd,raoofm/etcd,ktateish/etcd,chai2010/etcd,betawaffle/etcd,fanminshi/etcd,SivagnanamCiena/etcd,jeremyeder/etcd,handsomesun/etcd,yifan-gu/etcd,nkhare/etcd,arthurcolle/etcd,HideoYamauchi/etcd,chipironcin/etcd,jravetch/etcd,glevand/coreos--etcd,joshix/etcd,vimalk78/etcd,sofuture/etcd,gtank/etcd,ylong/etcd,chai2010-playground/etcd,CrazyJvm/etcd,nekto0n/etcd,njharman/etcd,yudai/etcd,rnaveiras/etcd,bspline/etcd,onlyjob/etcd,pengzj/etcd,ajityagaty/etcd,endocode/etcd,lumjjb/etcd,hongchaodeng/etcd,fgbreel/etcd,mwitkow-io/etcd,swingbach/etcd,betawaffle/etcd,gosharplite/etcd,qiaochao911/etcd,yichengq/etcd,jefby/etcd,mike-lerch/etcd,mitake/etcd,Timer/etcd,iamqizhao/etcd,yyljlyy/etcd,chai2010-playground/etcd,gouyang/etcd,mwitkow/etcd,shafreeck/etcd,purpleidea/etcd,jefby/etcd