Document that rackspace is supported.
Document that rackspace is supported.

adamtheturtle/flocker,AndyHuu/flocker,hackday-profilers/flocker,hackday-profilers/flocker,runcom/flocker,agonzalezro/flocker,wallnerryan/flocker-profiles,LaynePeng/flocker,Azulinho/flocker,1d4Nf6/flocker,adamtheturtle/flocker,achanda/flocker,mbrukman/flocker,LaynePeng/flocker,achanda/flocker,Azulinho/flocker,adamtheturtle/flocker,hackday-profilers/flocker,wallnerryan/flocker-profiles,lukemarsden/flocker,agonzalezro/flocker,runcom/flocker,jml/flocker,agonzalezro/flocker,runcom/flocker,moypray/flocker,1d4Nf6/flocker,jml/flocker,AndyHuu/flocker,1d4Nf6/flocker,moypray/flocker,AndyHuu/flocker,mbrukman/flocker,moypray/flocker,lukemarsden/flocker,Azulinho/flocker,mbrukman/flocker,w4ngyi/flocker,w4ngyi/flocker,wallnerryan/flocker-profiles,achanda/flocker,lukemarsden/flocker,LaynePeng/flocker,w4ngyi/flocker,jml/flocker