Close tcp connection when client stops '/events' request.
Close tcp connection when client stops '/events' request.

Signed-off-by: Dong Chen <252dc6b7229d6040aded2d6fd307bed15f92f3c6@docker.com>

docker/docker.github.io,rillig/docker.github.io,morpheyesh/swarm,danix800/docker.github.io,docker/docker.github.io,joeuo/docker.github.io,rillig/docker.github.io,Spritekin/swarm,moxiegirl/swarm,JimGalasyn/docker.github.io,BSWANG/denverdino.github.io,shin-/docker.github.io,denverdino/denverdino.github.io,troy0820/docker.github.io,shubheksha/docker.github.io,JimGalasyn/docker.github.io,kunalkushwaha/swarm,johnstep/docker.github.io,liubin/swarm,CodeNow/swarm,BSWANG/denverdino.github.io,londoncalling/docker.github.io,denverdino/docker.github.io,jimmycmh/swarm,jzwlqx/denverdino.github.io,docker-zh/docker.github.io,menglingwei/denverdino.github.io,liubin/swarm,denverdino/docker.github.io,BSWANG/denverdino.github.io,bdwill/docker.github.io,rancher/swarm,schmunk42/swarm,riuvshin/swarm,danix800/docker.github.io,shubheksha/docker.github.io,LukasBacigal/swarm,alexisbellido/docker.github.io,xFragger/swarm,joeuo/docker.github.io,Spritekin/swarm,JimGalasyn/docker.github.io,troy0820/docker.github.io,sanscontext/docker.github.io,johnstep/docker.github.io,rchicoli/swarm,londoncalling/docker.github.io,LuisBosquez/docker.github.io,kyhavlov/swarm,phiroict/docker,alexisbellido/docker.github.io,BSWANG/denverdino.github.io,docker-zh/docker.github.io,denverdino/docker.github.io,resouer/swarm,LuisBosquez/docker.github.io,alexisbellido/docker.github.io,alexisbellido/docker.github.io,jzwlqx/denverdino.github.io,docker/docker.github.io,londoncalling/docker.github.io,denverdino/denverdino.github.io,denverdino/denverdino.github.io,danix800/docker.github.io,shubheksha/docker.github.io,anweiss/docker.github.io,sanscontext/docker.github.io,anweiss/docker.github.io,troy0820/docker.github.io,phiroict/docker,sanscontext/docker.github.io,joeuo/docker.github.io,shubheksha/docker.github.io,xFragger/swarm,barais/swarm,joeuo/docker.github.io,ezrasilvera/swarm,kyhavlov/swarm,londoncalling/docker.github.io,cpuguy83/swarm,rillig/docker.github.io,joaofnfernandes/docker.github.io,CiaranCostello/swarm,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,LuisBosquez/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,aduermael/docker.github.io,bdwill/docker.github.io,megamsys/swarm,CiaranCostello/swarm,gdevillele/docker.github.io,linecheng/swarm,menglingwei/denverdino.github.io,megamsys/swarm,denverdino/docker.github.io,echupriyanov/swarm,resouer/swarm,docker-zh/docker.github.io,linecheng/swarm,shin-/docker.github.io,gdevillele/docker.github.io,MHBauer/swarm,gdevillele/docker.github.io,sfsmithcha/swarm,shubheksha/docker.github.io,gdevillele/docker.github.io,echupriyanov/swarm,BSWANG/swarm,docker-zh/docker.github.io,anweiss/docker.github.io,phiroict/docker,kunalkushwaha/swarm,thaJeztah/docker.github.io,joeuo/docker.github.io,ch3lo/swarm,joaofnfernandes/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,schmunk42/swarm,sanscontext/docker.github.io,CodeNow/swarm,qianzhangxa/swarm,bdwill/docker.github.io,jzwlqx/denverdino.github.io,anweiss/docker.github.io,mgoelzer/swarm,menglingwei/denverdino.github.io,moxiegirl/swarm,denverdino/docker.github.io,LukasBacigal/swarm,shin-/docker.github.io,bdwill/docker.github.io,bdwill/docker.github.io,rancher/swarm,barais/swarm,menglingwei/denverdino.github.io,joaofnfernandes/docker.github.io,rillig/docker.github.io,BSWANG/denverdino.github.io,phiroict/docker,allencloud/swarm,fugr/swarm,gdevillele/docker.github.io,rchicoli/swarm,sanscontext/docker.github.io,sfsmithcha/swarm,joaofnfernandes/docker.github.io,jzwlqx/denverdino.github.io,doronp/swarm,aduermael/docker.github.io,thaJeztah/docker.github.io,docker-zh/docker.github.io,shin-/docker.github.io,denverdino/denverdino.github.io,LuisBosquez/docker.github.io,troy0820/docker.github.io,mgoelzer/swarm,johnstep/docker.github.io,atlassian/swarm,docker/docker.github.io,LuisBosquez/docker.github.io,aduermael/docker.github.io,aduermael/docker.github.io,joaofnfernandes/docker.github.io,ezrasilvera/swarm,swarm-hooks/swarm,johnstep/docker.github.io,docker/docker.github.io,auzias/swarm,jzwlqx/denverdino.github.io,johnstep/docker.github.io,menglingwei/denverdino.github.io,gradywang/swarm,riuvshin/swarm,jimmycmh/swarm,shin-/docker.github.io,swarm-hooks/swarm,morpheyesh/swarm,ch3lo/swarm,qianzhangxa/swarm,BSWANG/swarm,allencloud/swarm,phiroict/docker,MHBauer/swarm,atlassian/swarm,doronp/swarm,cpuguy83/swarm,fugr/swarm,gradywang/swarm,auzias/swarm,danix800/docker.github.io,alexisbellido/docker.github.io,denverdino/denverdino.github.io