Update TODO list.

doc/TODO

@@ -1,6 +1,6 @@
 TODO list for PostgreSQL
 ========================
-Last updated:		Fri Oct 12 13:33:42 EDT 2001
+Last updated:		Fri Oct 12 13:34:31 EDT 2001
 
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
 
@@ -311,6 +311,7 @@ MISCELLANEOUS
 * Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
   when it is available
 * Use mmap() rather than SYSV shared memory(?) [mmap]
+* Use mmap() to write WAL files(?) [mmap]
 * Improve Subplan list handling
 * Allow Subplans to use efficient joins(hash, merge) with upper variable
 * Improve dynamic memory allocation by introducing tuple-context memory