Update TODO list.

doc/TODO

 TODO list for PostgreSQL
 ========================
-Last updated:		Fri Sep 28 11:31:14 EDT 2001
+Last updated:		Fri Sep 28 17:39:19 EDT 2001
 
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
 
@@ -317,6 +317,7 @@ MISCELLANEOUS
 * Allow logging of query durations
 * Add hash for evaluating GROUP BY aggregates
 * -Read pg_hba.conf only on postmaster startup or SIGHUP (Bruce)
+* Make secondary WAL page write()'s write only modified data
 * Improve spinlock code [performance]
 	o use SysV semaphores or queue of backends waiting on the lock
 	o wakeup sleeper or sleep for less than one clock tick