doc: Put pg_temp into documentation index

Karl O. Pinc

doc/src/sgml/config.sgml

@@ -4810,7 +4810,7 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
         Likewise, the current session's temporary-table schema,
         <literal>pg_temp_<replaceable>nnn</></>, is always searched if it
         exists.  It can be explicitly listed in the path by using the
-        alias <literal>pg_temp</>.  If it is not listed in the path then
+        alias <literal>pg_temp</><indexterm><primary>pg_temp</></>.  If it is not listed in the path then
         it is searched first (even before <literal>pg_catalog</>).  However,
         the temporary schema is only searched for relation (table, view,
         sequence, etc) and data type names.  It is never searched for

doc/src/sgml/ref/create_function.sgml

@@ -684,7 +684,7 @@ SELECT * FROM dup(42);
     temporary-table schema, which is searched first by default, and
     is normally writable by anyone.  A secure arrangement can be had
     by forcing the temporary schema to be searched last.  To do this,
-    write <literal>pg_temp</> as the last entry in <varname>search_path</>.
+    write <literal>pg_temp</><indexterm><primary>pg_temp</><secondary>securing functions</></> as the last entry in <varname>search_path</>.
     This function illustrates safe usage:
    </para>