Log Message:
-----------
Add test to WAL replay to verify that xl_prev points back to the previous
WAL record; this is necessary to be sure we recognize stale WAL records
when a WAL page was only partially written during a system crash.
Tags:
----
REL7_3_STABLE
Modified Files:
--------------
pgsql/src/backend/access/transam:
xlog.c (r1.109.2.4 -> r1.109.2.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c.diff?r1=1.109.2.4&r2=1.109.2.5)
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TIP 4: Don't 'kill -9' the postmaster
