Log Message:
-----------
Remove the special variable for open_sync_bit used in O_SYNC and O_DSYNC
modes, replacing it with a call to a function that derives it from the
sync_method variable, now that it has distinct values for these two cases.
This means that assign_xlog_sync_method() no longer changes any settings,
thus fixing the bug introduced in the change to use a guc enum for
wal_sync_method.
Modified Files:
--------------
pgsql/src/backend/access/transam:
xlog.c (r1.308 -> r1.309)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c?r1=1.308&r2=1.309)