Isn't --allhosts dangerous?

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Taking actions cluster-wide via a shell script seems like it could have
dangerous unexpected side effects, and indeed while looking through old
tickets, I ran across http://tracker.ceph.com/issues/9407 . . .

This is "fixed" (by getting rid of the --allhosts option to init-ceph)
in https://github.com/ceph/ceph/pull/6089

The same PR also adds getopt to make processing of command-line options
more flexible.

Opinions? Reviews?

-- 
Nathan Cutler
Software Engineer Distributed Storage
SUSE LINUX, s.r.o.
Tel.: +420 284 084 037
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