layer: relax graphdriver ID format
layer: relax graphdriver ID format

Signed-off-by: Tonis Tiigi <c2470c48b2d3312d61f94f18d3a1cd113d1915ad@gmail.com>
paralin/docker,jvanz/docker,kojiromike/docker,jameszhan/docker,moby/moby,SvenDowideit/docker,yosifkit/docker,djs55/docker,Ramzec/docker,konstruktoid/docker-upstream,kolyshkin/docker,vdemeester/docker,rancher/docker,rancher/docker,flavio/docker,dims/docker,moby/moby,ibuildthecloud/docker,kolyshkin/moby,AkihiroSuda/docker,trebonian/docker,paralin/docker,maxamillion/docker,trebonian/docker,trebonian/docker,dims/docker,mahak/docker,SvenDowideit/docker,paralin/docker,AkihiroSuda/docker,jthelin/docker,AkihiroSuda/docker,allencloud/docker,unclejack/docker,maxamillion/docker,jthelin/docker,kolyshkin/moby,unclejack/docker,flavio/docker,laijs/moby,allencloud/docker,jimjag/docker,cpuguy83/docker,docker/docker,dmcgowan/docker,djs55/docker,laijs/moby,moul/docker,bearstech/moby,vdemeester/docker,Mokolea/docker,moul/docker,nawawi/docker,estesp/docker,mahak/docker,thaJeztah/docker,jlhawn/docker,moby/moby,Mokolea/docker,konstruktoid/docker-1,crosbymichael/docker,kojiromike/docker,moul/docker,x1022as/docker,x1022as/docker,Ramzec/docker,jameszhan/docker,jimjag/docker,ibuildthecloud/docker,konstruktoid/docker-upstream,laijs/docker,dims/docker,scotttlin/docker,cpuguy83/docker,thaJeztah/docker,scotttlin/docker,cpuguy83/docker,thaJeztah/docker,konstruktoid/docker-upstream,jlhawn/docker,pradipd/moby,rremer/moby,cpuguy83/docker,yosifkit/docker,kojiromike/docker,tmp6154/docker,jimjag/docker,laijs/docker,estesp/docker,nawawi/docker,johnstep/moby-moby,yongtang/docker,Ramzec/docker,nawawi/docker,jwhonce/docker,thaJeztah/docker,pradipd/moby,rancher/docker,mahak/docker,yongtang/docker,konstruktoid/docker-1,dmcgowan/docker,bearstech/moby,tmp6154/docker,dmcgowan/docker,mahak/docker,trebonian/docker,pradipd/moby,nalind/docker,moul/docker,nalind/docker,justincormack/docker,gnailuy/docker,YuPengZTE/docker,KarthikNayak/docker,bearstech/moby,yongtang/docker,ibuildthecloud/docker,YuPengZTE/docker,justincormack/docker,jimjag/docker,paralin/docker,moby/moby,kolyshkin/docker,johnstep/moby-moby,unclejack/docker,AkihiroSuda/docker,scotttlin/docker,nalind/docker,laijs/moby,jwhonce/docker,ibuildthecloud/docker,jvanz/docker,rremer/moby,Mokolea/docker,justincormack/docker,mikebrow/docker,SvenDowideit/docker,mikebrow/docker,gnailuy/docker,flavio/docker,gnailuy/docker,rremer/moby,mikebrow/docker,YuPengZTE/docker,ibuildthecloud/docker,bearstech/moby,jameszhan/docker,allencloud/docker,crosbymichael/docker,kolyshkin/moby,vdemeester/docker,docker/docker,KarthikNayak/docker,estesp/docker,jlhawn/docker,johnstep/moby-moby,nawawi/docker,gnailuy/docker,konstruktoid/docker-upstream,tmp6154/docker,maxamillion/docker,Mokolea/docker,nalind/docker,flavio/docker,Ramzec/docker,laijs/docker,x1022as/docker,docker/docker,KarthikNayak/docker,yosifkit/docker,crosbymichael/docker,jwhonce/docker,jvanz/docker,yosifkit/docker,konstruktoid/docker-1,djs55/docker