John Blackbourn ec80a9fd63 XML-RPC: Emit an appropriate HTTP status code when an error is returned in response to an XML-RPC request.
This most notably affects the response when XML-RPC is disabled or when the supplied username and password is incorrect.

Props ericmann

Fixes #48213

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git-svn-id: http://core.svn.wordpress.org/trunk@49581 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-12-21 20:23:02 +00:00
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