Fix log_temp_files docs and comments to say bytes not kilobytes.

stat(2) field st_size returns bytes not kilobytes.
Bug found during recent performance tuning for PostgreSQL user.

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.282 2010/06/22 02:57:49 rhaas Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.283 2010/06/25 13:11:25 sriggs Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -3566,7 +3566,7 @@ FROM pg_stat_activity;
         A log entry is made for each temporary file when it is deleted.
         A value of zero logs all temporary file information, while positive
         values log only files whose size is greater than or equal to
-        the specified number of kilobytes.  The
+        the specified number of bytes.  The
         default setting is <literal>-1</>, which disables such logging.
         Only superusers can change this setting.
        </para>

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.556 2010/06/17 17:44:40 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.557 2010/06/25 13:11:25 sriggs Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -2051,7 +2051,7 @@ static struct config_int ConfigureNamesInt[] =
 
 	{
 		{"log_temp_files", PGC_SUSET, LOGGING_WHAT,
-			gettext_noop("Log the use of temporary files larger than this number of kilobytes."),
+			gettext_noop("Log the use of temporary files larger than this number of bytes."),
 			gettext_noop("Zero logs all files. The default is -1 (turning this feature off)."),
 			GUC_UNIT_KB
 		},