Adding mimic.rst and dropping related changes from PendingReleaseNotes. Also
added a few ref. labels from the major changes section
Signed-off-by: Abhishek Lekshmanan <abhishek@suse.com>
rgw_frontends options port= and endpoint= can be given multiple times,
and the beast frontend will listen on each endpoint
Fixes: http://tracker.ceph.com/issues/22779
Signed-off-by: Casey Bodley <cbodley@redhat.com>