docs: remove outdated reference to updating /etc/hosts
docs: remove outdated reference to updating /etc/hosts

Starting with docker 1.10, docker no longer uses
/etc/hosts for service discovery, but uses an
embedded DNS server. This patch removes a reference
to the old (pre 1.10) behavior.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

noironetworks/docker,JMesser81/docker,thtanaka/docker,gjaskiewicz/moby,nawawi/docker,mtesselH/docker,kojiromike/docker,imkin/moby,haveatry/docker,lixiaobing10051267/docker,michael-holzheu/docker,yosifkit/docker,srust/docker,hqhq/moby,thaJeztah/docker,ndeloof/docker,liaoqingwei/docker,danyalKhaliq10p/moby,yosifkit/docker,rancher/docker,catinthesky/docker,nalind/docker,amatsus/docker,madhanrm/docker,dims/docker,kencochrane/docker,johnstep/moby-moby,ibuildthecloud/docker,konstruktoid/docker-1,estesp/docker,erikh/docker,djs55/docker,tianon/docker,haveatry/docker,whuwxl/docker,alfred-landrum/docker,YuPengZTE/docker,cpuguy83/docker,jwhonce/docker,rancher/docker,dccurtis/docker,allencloud/docker,POLJM242/docker,konstruktoid/docker-1,srust/docker,kencochrane/docker,yummypeng/docker,mikebrow/docker,mike1729/docker,resin-io/docker,gjaskiewicz/moby,mixja/docker,tophj-ibm/moby,srust/docker,mikebrow/docker,yosifkit/docker,kolyshkin/moby,YuPengZTE/docker,flavio/docker,ffoysal/docker,jlhawn/docker,dgageot/docker,AkihiroSuda/docker,charleszheng44/moby,unclejack/docker,sdurrheimer/docker,ibuildthecloud/docker,pramodhkp/moby,miminar/docker,yongtang/docker,miminar/docker,noironetworks/docker,dsheets/moby,tmp6154/docker,allencloud/docker,duglin/docker,konstruktoid/docker-upstream,dims/docker,moul/docker,tophj-ibm/docker,haveatry/docker,Syntaxide/docker,darrenstahlmsft/moby,ripcurld0/moby,ffoysal/docker,mahak/docker,cpuguy83/docker,maxamillion/docker,imkin/moby,kolyshkin/moby,jameszhan/docker,madhanrm/docker,mahak/docker,dperny/docker,jvanz/docker,mtesselH/docker,nalind/docker,tmp6154/docker,Mokolea/docker,jvanz/docker,djs55/docker,michael-holzheu/docker,fcrisciani/docker,justincormack/docker,mkumatag/docker,lixiaobing1/docker,jameszhan/docker,scotttlin/docker,KingEmet/docker,x1022as/docker,liaoqingwei/docker,yosifkit/docker,lixiaobing1/docker,catinthesky/docker,dims/docker,KingEmet/docker,thaJeztah/docker,dccurtis/docker,PatrickLang/moby,ibuildthecloud/docker,estesp/docker,rancher/docker,michael-holzheu/docker,kojiromike/docker,Ramzec/docker,darrenstahlmsft/docker,trebonian/docker,scotttlin/docker,rhatdan/docker,shishir-a412ed/docker,konstruktoid/docker-upstream,tmp6154/docker,jthelin/docker,laijs/docker,sarnautov/moby,vdemeester/docker,cpuguy83/docker,ripcurld0/moby,trebonian/docker,yasiramin10p/moby,mtesselH/docker,crosbymichael/docker,moby/moby,mkumatag/docker,nalind/docker,coolljt0725/docker,darrenstahlmsft/moby,sarnautov/moby,x1022as/docker,trebonian/docker,justincormack/docker,Syntaxide/docker,tophj-ibm/docker,Ramzec/docker,JMesser81/docker,rremer/moby,djs55/docker,shhsu/docker,dperny/docker,mike1729/docker,laijs/docker,Ramzec/docker,thaJeztah/docker,darrenstahlmsft/docker,YuPengZTE/docker,danyalKhaliq10p/moby,jlhawn/docker,laijs/moby,yummypeng/docker,jwhonce/docker,nawawi/docker,shishir-a412ed/docker,bearstech/moby,mixja/docker,ripcurld0/moby,gschaetz/moby,yasiramin10p/moby,justincormack/docker,raja-sami-10p/moby,miminar/docker,diogomonica/docker,fcrisciani/docker,hqhq/moby,jimjag/docker,kolyshkin/docker,jvanz/docker,allencloud/docker,KarthikNayak/docker,diogomonica/docker,dsheets/moby,ColinHebert/docker,tonistiigi/docker,tklauser/docker,lixiaobing10051267/docker,jthelin/docker,yongtang/docker,JMesser81/docker,bearstech/moby,gschaetz/moby,dsheets/moby,ibuildthecloud/docker,dmcgowan/docker,tophj-ibm/docker,gnailuy/docker,AkihiroSuda/docker,alfred-landrum/docker,duglin/docker,kojiromike/docker,prertik/docker,naveed-jamil-tenpearls/moby,prertik/docker,KarthikNayak/docker,gnailuy/docker,pradipd/moby,trebonian/docker,moul/docker,PatrickLang/moby,bonczj/moby-json-file-logger,konstruktoid/docker-1,dgageot/docker,moypray/docker,shhsu/docker,pramodhkp/moby,lixiaobing1/docker,flavio/docker,paralin/docker,nawawi/docker,rremer/moby,ffoysal/docker,dgageot/docker,erikh/docker,mstanleyjones/docker,moby/moby,shhsu/docker,thtanaka/docker,shishir-a412ed/docker,cpuguy83/docker,jameszhan/docker,cyphar/docker,moul/docker,whuwxl/docker,SvenDowideit/docker,ColinHebert/docker,unclejack/docker,vdemeester/docker,cyphar/docker,charleszheng44/moby,tianon/docker,jimjag/docker,jwhonce/docker,rremer/moby,sdurrheimer/docker,pradipd/moby,johnstep/moby-moby,alfred-landrum/docker,sterchelen/docker,yummypeng/docker,POLJM242/docker,paralin/docker,mahak/docker,akira-baruah/docker,Mokolea/docker,rhatdan/docker,coreos/docker,AkihiroSuda/docker,SvenDowideit/docker,gnailuy/docker,tophj-ibm/moby,erikh/docker,noironetworks/docker,docker/docker,kencochrane/docker,moby/moby,mahak/docker,docker/docker,bearstech/moby,tonistiigi/docker,pradipd/moby,akira-baruah/docker,unclejack/docker,jlhawn/docker,resin-io/docker,imkin/moby,gschaetz/moby,liaoqingwei/docker,yasiramin10p/moby,tklauser/docker,diogomonica/docker,ndeloof/docker,moypray/docker,nawawi/docker,flavio/docker,amatsus/docker,amatsus/docker,pramodhkp/moby,ibuildthecloud/docker,thaJeztah/docker,bonczj/moby-json-file-logger,whuwxl/docker,bearstech/moby,flavio/docker,thtanaka/docker,dmcgowan/docker,darrenstahlmsft/moby,paralin/docker,KarthikNayak/docker,tonistiigi/docker,docker/docker,moypray/docker,Syntaxide/docker,maxamillion/docker,mixja/docker,sarnautov/moby,coolljt0725/docker,cyphar/docker,coreos/docker,gjaskiewicz/moby,raja-sami-10p/moby,x1022as/docker,dccurtis/docker,SvenDowideit/docker,nalind/docker,konstruktoid/docker-upstream,Ramzec/docker,paralin/docker,prertik/docker,vdemeester/docker,danyalKhaliq10p/moby,dmcgowan/docker,crosbymichael/docker,crosbymichael/docker,kolyshkin/docker,mike1729/docker,scotttlin/docker,mstanleyjones/docker,raja-sami-10p/moby,lixiaobing10051267/docker,sterchelen/docker,jimjag/docker,bonczj/moby-json-file-logger,johnstep/moby-moby,mkumatag/docker,coreos/docker,KingEmet/docker,naveed-jamil-tenpearls/moby,laijs/moby,konstruktoid/docker-upstream,dperny/docker,jimjag/docker,Mokolea/docker,sterchelen/docker,naveed-jamil-tenpearls/moby,rhatdan/docker,resin-io/docker,madhanrm/docker,duglin/docker,coolljt0725/docker,tophj-ibm/moby,yongtang/docker,hqhq/moby,catinthesky/docker,Mokolea/docker,AkihiroSuda/docker,ndeloof/docker,darrenstahlmsft/docker,moby/moby,ColinHebert/docker,mstanleyjones/docker,mikebrow/docker,moul/docker,sdurrheimer/docker,laijs/docker,tklauser/docker,laijs/moby,PatrickLang/moby,charleszheng44/moby,maxamillion/docker,gnailuy/docker,kolyshkin/moby,estesp/docker,fcrisciani/docker