Revert "Revert "libcontainer: Use MS_PRIVATE instead of MS_SLAVE""
Revert "Revert "libcontainer: Use MS_PRIVATE instead of MS_SLAVE""

This reverts commit bd263f5b15b51747e3429179fef7fcb425ccbe4a.

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

crosbymichael/runc,gwoo/runc,liuwharton/runc,shakamunyi/libcontainer,ChengTiesheng/runc,Microsoft/libcontainer,mrunalp/libcontainer,cloudfoundry-incubator/runc,sallyom/runc,jhjeong-kr/runc,rootfs/runc,kimh/runc,ZJU-SEL/runc,LK4D4/runc,coolljt0725/runc,avagin/libcontainer,markllama/runc,milosgajdos83/libcontainer-milosgajdos83,Microsoft/libcontainer,navidshaikh/runc,kimh/runc,kolyshkin/runc,tangkun75/libcontainer,dqminh/runc,unclejack/libcontainer,ddnbgroup/runc,ycaihua/runc,dqminh/libcontainer,boucher/runc,wcwxyz/runc,mheon/runc,docker/runc,abduld/runc,aidanhs/runc,mapk0y/runc,calavera/runc,balajibr/runc,zhangyancoder/libcontainer,thaJeztah/libcontainer,rootfs/runc,LK4D4/runc,fabiokung/runc,mYmNeo/runc,ChengTiesheng/runc,whosthatknocking/runc,shishir-a412ed/runc,mikebrow/runc,navidshaikh/runc,adrianreber/runc,ycaihua/libcontainer,chenchun/runc,rsampaio/runc,hqhq/libcontainer,keloyang/libcontainer,mheon/runc,stefanberger/runc,axsh/runc,dqminh/libcontainer,laijs/runc,runcom/libcontainer,albertoleal/runc,dieface/runc,wangkirin/runc,cyphar/runc,marcosnils/runc,HardikDR/runc,lizf-os/runc,avagin/libcontainer,meihuabo/runc,rhatdan/runc,maxamillion/runc,booyaa/runc,liuwharton/runc,clnperez/runc,ChengTiesheng/runc,tangkun75/libcontainer,boucher/libcontainer,keloyang/libcontainer,adrianreber/runc,talwai/runc,clnperez/runc,unclejack/libcontainer,keloyang/runc,mapk0y/runc,kolyshkin/runc,whuwxl/libcontainer,intfrr/runc,subuser-security/runc,Mashimiao/libcontainer,whosthatknocking/runc,zhangyancoder/libcontainer,mrunalp/libcontainer,mYmNeo/runc,ZJU-SEL/libcontainer,rsampaio/runc,crosbymichael/libcontainer,kolyshkin/runc,cxxly/runc,w4ngyi/libcontainer,Mashimiao/libcontainer,wangkirin/runc,intfrr/runc,dqminh/runc,carlye566/runc,mapk0y/runc,crosbymichael/libcontainer,vbatts/runc,abduld/runc,mrunalp/runc,marcosnils/runc,estesp/libcontainer,mikebrow/runc,hqhq/runc,clnperez/runc,runcom/runc,LTD-Beget/libcontainer,mheon/runc,LTD-Beget/libcontainer,han-wang/runc,opencontainers/runc,estesp/libcontainer,unclejack/libcontainer,jwuwork/runc,ZJU-SEL/libcontainer,talwai/runc,abduld/runc,laijs/runc,InformatiQ/runc,SaiedKazemi/libcontainer-criu,boucher/libcontainer,runcom/libcontainer,lizf-os/runc,carlye566/runc,docker/libcontainer,subuser-security/runc,hqhq/libcontainer,estesp/libcontainer,kolyshkin/runc,shishir-a412ed/runc,willmtemple/runc,ddnbgroup/runc,opencontainers/runc,vbatts/runc,booyaa/runc,dqminh/runc,ycaihua/runc,balajibr/runc,rhatdan/runc,mYmNeo/runc,HardikDR/runc,albertoleal/runc,dqminh/libcontainer,zhangyancoder/libcontainer,WeiZhang555/runc,jwuwork/runc,sallyom/runc,crosbymichael/runc,shenxiaochen/libcontainer,cyphar/runc,avagin/runc,Mashimiao/libcontainer,boucher/libcontainer,rhatdan/libcontainer,gitido/runc,willmtemple/runc,coolljt0725/runc,keloyang/runc,balajibr/runc,icecrime/libcontainer,mheon/libcontainer,wcwxyz/runc,ZJU-SEL/runc,rhatdan/runc,Microsoft/libcontainer,shenxiaochen/libcontainer,ycaihua/runc,haijunTan/runc,jhjeong-kr/runc,jhowardmsft/runc,albertoleal/runc,stefanberger/runc,inatatsu/runc,avagin/runc,jwuwork/runc,hqhq/runc,dieface/runc,stefanberger/runc,YujiOshima/runc,opencontainers/runc,keloyang/libcontainer,shakamunyi/libcontainer,avagin/runc,hxfeng/runc,willmtemple/runc,BrickXu/libcontainer,sunyuan3/runc,fabiokung/runc,zenlinTechnofreak/runc,gitido/runc,lizf-os/runc,nkwilson/runc,dqminh/runc,inatatsu/runc,ycaihua/libcontainer,calavera/runc,BrickXu/libcontainer,adrianreber/runc,coolljt0725/runc,meihuabo/runc,haijunTan/runc,BrickXu/libcontainer,rajasec/runc,thaJeztah/libcontainer,rajasec/runc,axsh/runc,runcom/runc,hxfeng/runc,xiaochenshen/runc,rhatdan/runc,han-wang/runc,shishir-a412ed/runc,maxamillion/runc,cxxly/runc,haijunTan/runc,SaiedKazemi/libcontainer-criu,justincormack/runc,axsh/runc,WeiZhang555/runc,ZJU-SEL/libcontainer,zenlinTechnofreak/runc,navidshaikh/runc,HuKeping/runc,crosbymichael/runc,jhowardmsft/runc,shenxiaochen/libcontainer,boucher/runc,ekuric/runc,inatatsu/runc,docker/libcontainer,estesp/runc,mrunalp/libcontainer,LTD-Beget/libcontainer,cyphar/runc,zenlinTechnofreak/runc,wking/runc,boucher/runc,tangkun75/libcontainer,xiaochenshen/runc,mrunalp/runc,ddnbgroup/runc,runcom/runc,w4ngyi/libcontainer,han-wang/runc,wking/runc,kimh/runc,wangkirin/runc,mrunalp/runc,HuKeping/runc,ekuric/runc,wking/runc,sallyom/runc,crosbymichael/libcontainer,whuwxl/libcontainer,w4ngyi/libcontainer,keloyang/runc,rhatdan/libcontainer,jhowardmsft/runc,cxxly/runc,nkwilson/runc,rsampaio/runc,YujiOshima/runc,subuser-security/runc,WeiZhang555/runc,nkwilson/runc,justincormack/runc,mheon/libcontainer,SaiedKazemi/libcontainer-criu,whuwxl/libcontainer,laijs/runc,rhatdan/libcontainer,vbatts/runc,runcom/libcontainer,cloudfoundry-incubator/runc,whosthatknocking/runc,opencontainers/runc,InformatiQ/runc,meihuabo/runc,rootfs/runc,icecrime/libcontainer,mikebrow/runc,thaJeztah/libcontainer,icecrime/libcontainer,ZJU-SEL/runc,sunyuan3/runc,justincormack/runc,gitido/runc,ycaihua/libcontainer,HardikDR/runc,HuKeping/runc,avagin/libcontainer,sunyuan3/runc,docker/runc,chenchun/runc,markllama/runc,calavera/runc,chenchun/runc,rajasec/runc,talwai/runc,hqhq/libcontainer,carlye566/runc,fabiokung/runc,YujiOshima/runc,milosgajdos83/libcontainer-milosgajdos83,booyaa/runc,liuwharton/runc,xiaochenshen/runc,hxfeng/runc,estesp/runc,hqhq/runc,markllama/runc,LK4D4/runc,InformatiQ/runc,intfrr/runc,maxamillion/runc,wcwxyz/runc,aidanhs/runc,estesp/runc,aidanhs/runc,shakamunyi/libcontainer,ekuric/runc,mheon/libcontainer,docker/runc,dieface/runc,marcosnils/runc,jhjeong-kr/runc,keloyang/libcontainer,cloudfoundry-incubator/runc,docker/libcontainer