Just document the syntax in mongoc_uri_t.page and link to the server documentation on what the option does.
Also document the new getter: mongoc_uri_get_read_concern
- depends on
- 
                    CDRIVER-1007 Document new read_concern functions -         
- Closed
 
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- is depended on by
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                    CDRIVER-837 Add support for the readConcern option -         
- Closed
 
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