Commit5ca543f

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Clarify C comment that O_SYNC/O_FSYNC are really the same settting, as

opposed to O_DSYNC.

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Original file line number	Diff line number	Diff line change
`@@ -8600,7 +8600,7 @@ get_sync_bit(int method)`
`8600`	`8600`
`8601`	`8601`	`/*`
`8602`	`8602`	`* Optimize writes by bypassing kernel cache with O_DIRECT when using`
`8603`		`- * O_SYNC, O_DSYNC or O_FSYNC. But only if archiving and streaming are`
	`8603`	`+ * O_SYNC/O_FSYNC and O_DSYNC. But only if archiving and streaming are`
`8604`	`8604`	`* disabled, otherwise the archive command or walsender process will read`
`8605`	`8605`	`* the WAL soon after writing it, which is guaranteed to cause a physical`
`8606`	`8606`	`* read if we bypassed the kernel cache. We also skip the`

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