utility functions for handling optional HTTP parameters
utility functions for handling optional HTTP parameters

pratikmallya/gophercloud,pratikmallya/gophercloud,rgbkrk/gophercloud,timbyr/gophercloud,timbyr/gophercloud,jamiehannaford/gophercloud,carolynvs/gophercloud,clintonskitson/gophercloud,clintonskitson/gophercloud,larsbutler/gophercloud,larsbutler/gophercloud,dudymas/gophercloud,rackspace/gophercloud,feiskyer/gophercloud,sti-jans/gophercloud,rackspace/gophercloud,carolynvs/gophercloud,feiskyer/gophercloud,DSpeichert/gophercloud,dudymas/gophercloud,rgbkrk/gophercloud,trumant/gophercloud,jarosser06/gophercloud,DSpeichert/gophercloud,jarosser06/gophercloud,sti-jans/gophercloud,trumant/gophercloud,jamiehannaford/gophercloud