v20.2.3
doc/start: add vstart install guide
doc/start/ceph.conf: trim the sample ceph.conf file
doc/start: edit documenting-ceph.rst
doc: Update the old ceph.com/community/ links to ceph.io/en/news/blog/
doc/start: Add ARM support note to hardware-recommendations.rst
doc/start: Mention RGW in Intro to Ceph
doc: remove redundant note about tested container hosts
doc: remove references to ceph-deploy