uthor Alex Elder <elder@inktank.com> 1337801723 -0500
committer Sage Weil <sage@inktank.com> 1341548067 -0700

libceph: define and use an explicit CONNECTED state

There is no state explicitly defined when a ceph connection is fully
operational.  So define one.

It's set when the connection sequence completes successfully, and is
cleared when the connection gets closed.

Be a little more careful when examining the old state when a socket
disconnect event is reported.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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