v19.2.2
doc/start: add vstart install guide
doc/start/ceph.conf: trim the sample ceph.conf file
doc: s/Whereas,/Although/
doc/start: update mailing list links
doc/start: fix "are are" typo
doc/start: remove "intro.rst"
doc/start: update os-recommendations.rst
doc: remove references to ceph-deploy