Add a link in the CRUSH definition to the original CRUSH paper.
Signed-off-by: Zac Dover <zac.dover@proton.me>
CRUSH
**C**\ontrolled **R**\eplication **U**\nder **S**\calable
**H**\ashing. The algorithm that Ceph uses to compute object
- storage locations.
+ storage locations. See `CRUSH: Controlled, Scalable,
+ Decentralized Placement of Replicated Data
+ <https://ceph.com/assets/pdfs/weil-crush-sc06.pdf>`_.
CRUSH rule
The CRUSH data placement rule that applies to a particular