pgsql: Write a WAL record whenever we perform an operation without

Log Message:
-----------
Write a WAL record whenever we perform an operation without WAL-logging
that would've been WAL-logged if archiving was enabled. If we encounter
such records in archive recovery anyway, we know that some data is
missing from the log. A WARNING is emitted in that case.

Original patch by Fujii Masao, with changes by me.

Modified Files:
--------------
pgsql/src/backend/access/heap:
heapam.c (r1.282 -> r1.283)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/heap/heapam.c?r1=1.282&r2=1.283)
pgsql/src/backend/access/nbtree:
nbtsort.c (r1.122 -> r1.123)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/nbtree/nbtsort.c?r1=1.122&r2=1.123)
pgsql/src/backend/access/transam:
xlog.c (r1.358 -> r1.359)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c?r1=1.358&r2=1.359)
pgsql/src/backend/commands:
cluster.c (r1.193 -> r1.194)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/cluster.c?r1=1.193&r2=1.194)
tablecmds.c (r1.316 -> r1.317)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c?r1=1.316&r2=1.317)
pgsql/src/include/access:
xlog.h (r1.97 -> r1.98)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/access/xlog.h?r1=1.97&r2=1.98)
pgsql/src/include/catalog:
pg_control.h (r1.48 -> r1.49)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_control.h?r1=1.48&r2=1.49)