config_opts: add two ceph-rest-api-only variables for convenience

These aren't used by the C++ code at all, but in order for
rados_conf_get to find them, they need to be listed.  They're
consumed by ceph_rest_api.

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Merge pull request #509 from dmick/wip-rest-conf

config_opts: add two ceph-rest-api-only variables for convenience

Reviewed-by: Sage Weil <sage@inktank.com>
auth-config-ref.rst: fix signature keys

Fix names of cephx signature keys.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
filestore-config-ref.rst: mark some filestore keys as deprecated

Marked the following keys as deprecated since v0.65:
- filestore flusher
- filestore flusher max fds
- filestore sync flush

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
Merge pull request #513 from dalgaaf/fix/wip-da-documentation

Fix documentation issues
Merge remote-tracking branch 'gh/next'