Support RHEL 6+ for now
Support RHEL 6+ for now

RHEL 5 fails to start right now.
opscode-cookbooks/squid,akaasjager/squid-icap,akaasjager/squid-icap,kevinrbabcock/squid,snkutlu/squid,criteo-forks/squid,bitmonk/chef-squid,bitmonk/chef-squid,chef-cookbooks/squid,snkutlu/squid,PrecisionNutrition/squid,jpmat296/squid,PrecisionNutrition/squid,chef-cookbooks/squid,criteo-forks/squid,opscode-cookbooks/squid,kevinrbabcock/squid,jpmat296/squid