Fix obsolete comment.

src/backend/utils/cache/relcache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.169 2002/08/02 22:36:05 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.170 2002/08/04 18:12:15 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2713,10 +2713,10 @@ insert_ordered_oid(List *list, Oid datum)
  *		Presently, all the catalog and index entries that are referred to
  *		by catcaches are stored in the initialization file.
  *
- *		As of v6.5, vacuum.c deletes the initialization file at completion
- *		of a VACUUM, so that it will be rebuilt at the next backend startup.
- *		This ensures that vacuum-collected stats for the system catalogs
- *		and indexes will be seen by backends started later.
+ *		The same mechanism that detects when catcache and relcache entries
+ *		need to be invalidated (due to catalog updates) also arranges to
+ *		unlink the initialization file when its contents may be out of date.
+ *		The file will then be rebuilt during the next backend startup.
  */
 
 /*