Make validate flag description more generic
Make validate flag description more generic

Signed-off-by: aiordache <39812d7fd70a462e93ee0815a2f4c75f6a164b2e@docker.com>

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