doc: Added draft of configuration guide for federated gateways.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added entry for federated configuration to the index.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added conf example.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added draft of region/zone diagram.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Made some changes and incorporated a draft diagram.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Adding context to the federated configuration guide.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated diagram.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated text for more specific region/zone example.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Minor caps change.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed a few typos.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Incorporated some feedback.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated diagram for added clarity.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added clarifying comments.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated to ensure that socket name isn't static.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
radosgw: create /var/log/radosgw in package, not init script

Fixes: #6475
Signed-off-by: Sage Weil <sage@inktank.com>
ceph: Remove unavailable option with clang

Some options are unavailable in clang. (-Wstrict-null-sentinel,
-rdynamic)

They were reintroduced by this commit
https://github.com/ceph/ceph/commit/6949d221ada12e6be4b5ebf94b58edd17288fb16

This patch fixes it.

Signed-off-by: Christophe Courtaut <christophe.courtaut@gmail.com>
ceph.spec.in:  Need to cread radosgw log directory.

Signed-off-by: Gary Lowell  <gary.lowell@inktank.com>
Merge pull request #722 from ceph/wip-6475

radosgw: create /var/log/radosgw in package, not init script

Reviewed-and-tested-by: Gary Lowell <gary.lowell@inktank.com>
ceph.spec.in:  Add erasure-code related files.
Signed-off-by: huangjun  <hjwsm1989@gmail.com>
Update ceph-authtool.rst

Fix typo