proxy: handle canceled proxy request gracefully
proxy: handle canceled proxy request gracefully

when a client of the proxy server cancels a request the proxy should not
set the endpoint state to unavailable

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