message: Deprecate non-const methods on mongocxx::client
diff: @@ -99,6 +99,10 @@ class MONGOCXX_API client {
  /// created by this client but do affect new ones as databases inherit the @c read_concern
  /// settings of their parent upon instantiation.
  ///
  + /// @deprecated
  + /// This method is deprecated. Read concerns should be set either in the URI or directly on
  + /// database or collection objects.
  + ///
  /// @param rc
  /// The new @c read_concern
  ///
  @@ -120,6 +124,10 @@ class MONGOCXX_API client {
  /// created by this client but do affect new ones as databases inherit the @c read_preference
  /// settings of their parent upon instantiation.
  ///
  + /// @deprecated
  + /// This method is deprecated. Read preferences should be set either in the URI or directly on
  + /// database or collection objects.
  + ///
  /// @param rp
  /// The new @c read_preference
  ///
  @@ -150,6 +158,10 @@ class MONGOCXX_API client {
  /// that have come from this client but do affect new ones as databases will receive a copy of
  /// this client's @c write_concern upon instantiation.
  ///
  + /// @deprecated
  + /// This method is deprecated. Write concerns should be set either in the URI or directly on
  + /// database or collection objects.
  + ///
  /// @param wc
  /// The new write concern
  ///
  