Log Message:
-----------
Reset minRecoveryPoint at checkpoints, so that we don't uselessly update
it in the control file at crash recovery following an archive recovery.
Per Fujii Masao and subsequent discussion.
Modified Files:
--------------
pgsql/src/backend/access/transam:
xlog.c (r1.354 -> r1.355)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c?r1=1.354&r2=1.355)