Description of problem:

Per glusterfs code (see https://github.com/gluster/glusterfs/commit/bd44d59741bb8c0f5d7a62c5b1094179dd0ce8a4#diff-d6c0e00b45c718e92b1a55ee7b9fe513), the quorum-reads option is no longer supported. However Gluster documentation for Client Quorum (see https://docs.gluster.org/en/latest/Administrator%20Guide/arbiter-volumes-and-quorum/#client-quorum) still indicates that this is a valid option. It does not indicate that the option is not supported in ver 4.0 and above. 

Furthermore, setting/getting the option on a gluster volume does not cause any error or "not supported" information to be displayed leading the user to believe that this is supported unless someone were to actually look at the code.

Version-Release number of selected component (if applicable):
4.0 and above

How reproducible:


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Expected results:


Additional info: