Reorganize CORS information into a new section.
Reorganize CORS information into a new section.

jonboulle/docs,iankronquist/docs,jdloft/docs,hkjn/docs-1,joshix/docs,mischief/coreos-docs,ionave/docs,skynet/docs,bq-xiao/docs,mjg59/docs,robszumski/docs,marineam/coreos-docs,coreos/docs,endocode/coreos-docs,ksmaheshkumar/docs-2,wli6/docs,atxwebs/docs,michelleN/docs