Add buffer_std flag to MarkBufferDirtyHint().

Jeff Davis <jdavis@postgresql.org>

Commit: b8fd1a09f382f04c41128fded4d56da2127ce92d
Author: Jeff Davis <jdavis@postgresql.org>
Date: 2013-06-17T15:02:12Z
Releases: 9.4.0
Add buffer_std flag to MarkBufferDirtyHint().

MarkBufferDirtyHint() writes WAL, and should know if it's got a
standard buffer or not. Currently, the only callers where buffer_std
is false are related to the FSM.

In passing, rename XLOG_HINT to XLOG_FPI, which is more descriptive.

Back-patch to 9.3.

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