Increase max concurrent requests for DNS from 100 to 1000
Increase max concurrent requests for DNS from 100 to 1000

This addresses/alleviates https://github.com/docker/libnetwork/issues/2214

The new proposed limit should remediate the issue for most users.

Signed-off-by: Thiago Alves Silva <08f8e3a21958073b40095d81f73cd6916ea6976f@aurea.com>

Mokolea/docker,docker/docker,nalind/docker,docker/docker,nalind/docker,bearstech/moby,Ramzec/docker,yosifkit/docker,djs55/docker,jameszhan/docker,mahak/docker,moby/moby,paralin/docker,jimjag/docker,nawawi/docker,flavio/docker,jimjag/docker,moul/docker,konstruktoid/docker-upstream,Ramzec/docker,Mokolea/docker,flavio/docker,nawawi/docker,moby/moby,jameszhan/docker,nalind/docker,cpuguy83/docker,jthelin/docker,flavio/docker,konstruktoid/docker-upstream,nawawi/docker,bearstech/moby,mahak/docker,djs55/docker,moby/moby,yosifkit/docker,thaJeztah/docker,moul/docker,AkihiroSuda/docker,nalind/docker,djs55/docker,thaJeztah/docker,AkihiroSuda/docker,jimjag/docker,gnailuy/docker,yosifkit/docker,paralin/docker,jameszhan/docker,Mokolea/docker,gnailuy/docker,Ramzec/docker,mahak/docker,bearstech/moby,Mokolea/docker,cpuguy83/docker,AkihiroSuda/docker,paralin/docker,trebonian/docker,jthelin/docker,thaJeztah/docker,thaJeztah/docker,gnailuy/docker,vdemeester/docker,Ramzec/docker,AkihiroSuda/docker,yosifkit/docker,gnailuy/docker,cpuguy83/docker,nawawi/docker,moul/docker,moul/docker,paralin/docker,trebonian/docker,moby/moby,jimjag/docker,vdemeester/docker,konstruktoid/docker-upstream,vdemeester/docker,flavio/docker,bearstech/moby,trebonian/docker,mahak/docker,docker/docker,cpuguy83/docker,trebonian/docker,konstruktoid/docker-upstream