v21.0.1
doc/cephadm: fix typo and missing quote in activate-existing-osds
doc: remove references to ceph-deploy
doc/cephadm: updating certmgr docs to reflects new changes
doc/cephadm: Fix spelling errors
doc/cephadm: small improvements continued
doc/cephadm: Fix more spelling errors
doc/cephadm: small improvements
cephadm: stop start cluster
doc/rados: improve troubleshooting-mon.rst
mgr: Control PG autoscaler during upgrades with pg_autoscale_during_upgrade