Added a unit test to illustrate bug when HTTP_X_FORWARDED_FOR header is comma delimited
Added a unit test to illustrate bug when HTTP_X_FORWARDED_FOR header is comma delimited

boone/geocoder,epyatopal/geocoder,3mundi/geocoder,andreamazz/geocoder,Devetzis/geocoder,tortuba/geocoder,jaigouk/geocoder-olleh,sjaveed/geocoder,sideci-sample/sideci-sample-geocoder,jaigouk/geocoder-olleh,aceunreal/geocoder,alexreisner/geocoder,StudioMelipone/geocoder,rios1993/geocoder,crdunwel/geocoder,tiramizoo/geocoder,gogovan/geocoder-olleh,TrangPham/geocoder,malandrina/geocoder,ankane/geocoder,jgrciv/geocoder,guavapass/geocoder,brian-ewell/geocoder,rayzeller/geocoder,davydovanton/geocoder,mdebo/geocoder,GermanDZ/geocoder,FanaHOVA/geocoder,rdlugosz/geocoder,sr-education/geocoder,donbobka/geocoder,mveer99/geocoder,AndyDangerous/geocoder,mehlah/geocoder,eugenehp/ruby-geocoder,moofish32/geocoder,ivanzotov/geocoder,gogovan/geocoder-olleh