PHPLIB-539: support hint in findAndDelete operations

src/Operation/FindAndModify.php

@@ -99,8 +99,7 @@ class FindAndModify implements Executable, Explainable
      *    name as a string or the index key pattern as a document. If specified,
      *    then the query system will only consider plans using the hinted index.
      *
-     *    This is only supported for update and replace operations (i.e. remove
-     *    option is false) on server versions >= 4.4. Using this option in
+     *    This is only supported on server versions >= 4.4. Using this option in
      *    other contexts will result in an exception at execution time.
      *
      *  * maxTimeMS (integer): The maximum amount of time to allow the query to

src/Operation/FindOneAndDelete.php

@@ -46,6 +46,13 @@ class FindOneAndDelete implements Executable, Explainable
      *    This is not supported for server versions < 3.4 and will result in an
      *    exception at execution time if used.
      *
+     *  * hint (string|document): The index to use. Specify either the index
+     *    name as a string or the index key pattern as a document. If specified,
+     *    then the query system will only consider plans using the hinted index.
+     *
+     *    This is not supported for server versions < 4.4 and will result in an
+     *    exception at execution time if used.
+     *
      *  * maxTimeMS (integer): The maximum amount of time to allow the query to
      *    run.
      *