doc:  mention inheritance's tableoid can be used in partitioning
Previously tableoid was not mentioned in the partition doc section.  We
only had a link to the "all the normal rules" of inheritance section.
Reported-by:
Discussion:
Backpatch-through: 10
@@ -4097,7 +4097,8 @@ ALTER INDEX measurement_city_id_logdate_key
<para>
Since a partition hierarchy consisting of the partitioned table and its
- partitions is still an inheritance hierarchy, all the normal rules of
+ partitions is still an inheritance hierarchy,
+ <structfield>tableoid</structfield> and all the normal rules of
inheritance apply as described in <xref linkend="ddl-inherit"/>, with
a few exceptions:
