Update TODO list.

Author: bmomjian

doc/TODO

@@ -1,6 +1,6 @@
 TODO list for PostgreSQL
 ========================
-Last updated:		Mon Jan 22 19:49:03 EST 2001
+Last updated:		Mon Jan 22 19:50:01 EST 2001
 
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
 
@@ -315,6 +315,7 @@ SOURCE CODE
 * Replace the use of fprint(stderr, ...) with elog() in backend code
 * -Allow libedit to be used in place of libreadline
 * -BSD/OS does not support locale because there is no LC_MESSAGES (Bruce)
+* Remove unused pg_variable table
 
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