Support proxy attribute
Support proxy attribute

mrb/yum,stan928/yum,someara/yum,chef-cookbooks/yum,edmunds-chef/yum,ikkyotech/OpsworksNodeAddons,mrb/yum,mattray/yum,criteo-forks/yum,ketan/yum,h4ck3rm1k3/yum,cookbooks/oc-yum,autotraderuk/yum,vkhatri/yum,mattray/yum,ikkyotech/OpsworksNodeAddons,edmunds-chef/yum,someara/yum,mrb/yum,xacaxulu/yum,stan928/yum,h4ck3rm1k3/yum,autotraderuk/yum,ketan/yum,chef-cookbooks/yum,autotraderuk/yum,juliandunn/yum,vkhatri/yum,xacaxulu/yum,xacaxulu/yum,ketan/yum,criteo-forks/yum,h4ck3rm1k3/yum,edmunds-chef/yum,vkhatri/yum,hippolin/yum-cookbook,mattray/yum,stan928/yum,streamlinesocial/yum,hippolin/yum-cookbook,juliandunn/yum,hippolin/yum-cookbook,someara/yum,GannettDigital/chef-yum,GannettDigital/chef-yum,GannettDigital/chef-yum