Boone Gorges 8dbc62d267 In comments_template(), don't run hierarchical queries if comment threading is disabled.
When hierarchical=true, `WP_Comment_Query` will always fetch comments according
to the comment hierarchy, even if 'thread_comments' is disabled for the site.
This can cause problems when comment threading is disabled after threaded
comments have been recorded on the site; comments will no longer be returned in
a strictly chronological order.

We address the issue by refraining from querying hierarchically when comment
threading is disabled.

Props jmdodd.
Fixes #35378.

git-svn-id: https://develop.svn.wordpress.org/trunk@36226 602fd350-edb4-49c9-b593-d223f7449a82
2016-01-08 22:16:11 +00:00
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