doc: Use write_full for C++ example
Latest version of librados uses write_full when writing entire object.

Should the documentation mention that the method "write" used to serve
this function.

Signed-off-by: Kevin Dalley <kevin@kelphead.org>
Merge pull request #1926 from nereocystis/librados-write-full

doc: Use write_full for C++ example
OSD: move waiting_for_pg into Session

This way, we can handle pg splits atomically with ms_fast_dispatch.

Signed-off-by: Samuel Just <sam.just@inktank.com>
Merge remote-tracking branches 'origin/wip-7999', 'origin/wip-8396', 'origin/wip-8438' and 'origin/wip-8507' into wip-sam-testing