* refs/pull/40924/head:
mgr/cephadm: check hostname resolution before adding host
cephadm: provide a way to checkhost connection without /etc/hosts passed the shell
doc/cephadm: remove /etc/hosts from list of hostname resoltion methods
Reviewed-by: Sage Weil <sage@redhat.com>
Reviewed-by: Adam King <adking@redhat.com>