Boone Gorges d26b868870 Don't notify post authors about spam comments.
[34106] moved post author notification to a hook, and in the process, missed
the 'spam' check. This changeset restores that check.

To make unit testing easier, the notification callbacks have been refactored
to return values: false when various conditions aren't met (eg, approved
comments should not trigger moderation emails), and the return value of the
`wp_notify_*()` function otherwise.

Props cfinke, kraftbj.
See #33587.

git-svn-id: https://develop.svn.wordpress.org/trunk@34250 602fd350-edb4-49c9-b593-d223f7449a82
2015-09-16 21:59:16 +00:00
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