fix(CONTRIBUTING): point to new mailing list
fix(CONTRIBUTING): point to new mailing list

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