Patch for disaster recovery

I have added this define to help people recover deleted tuples.
Of course it is only to be used for disaster recovery.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/backend/utils/time/tqual.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v
retrieving revision 1.81
diff -c -c -r1.81 tqual.c
*** src/backend/utils/time/tqual.c    31 Dec 2004 22:02:56 -0000    1.81
--- src/backend/utils/time/tqual.c    20 Feb 2005 04:52:13 -0000
***************
*** 776,781 ****
--- 776,786 ----
  HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot,
                             Buffer buffer)
  {
+ /* This is to be used only for disaster recovery and requires serious analysis. */
+ #ifdef MAKE_ALL_TUPLES_VISIBLE
+     return true;
+ #endif
+
      if (!(tuple->t_infomask & HEAP_XMIN_COMMITTED))
      {
          if (tuple->t_infomask & HEAP_XMIN_INVALID)