Document that only a table's owner may TRUNCATE it. Per Keith Worthington.

doc/src/sgml/ref/truncate.sgml

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-$PostgreSQL: pgsql/doc/src/sgml/ref/truncate.sgml,v 1.18 2005/01/27 03:17:08 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/truncate.sgml,v 1.19 2005/02/22 19:06:18 tgl Exp $
 PostgreSQL documentation
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@@ -53,6 +53,10 @@ TRUNCATE [ TABLE ] <replaceable class="PARAMETER">name</replaceable> [, ...]
  <refsect1>
   <title>Notes</title>
 
+  <para>
+   Only the owner of a table may <command>TRUNCATE</> it.
+  </para>
+
   <para>
    <command>TRUNCATE</> cannot be used on a table that has foreign-key
    references from other tables, unless all such tables are also truncated