[wp-trac] [WordPress Trac] #20226: Don't advertise pingback URL on resources that don't support pingbacks

[WordPress Trac]

#20226: Don't advertise pingback URL on resources that don't support pingbacks
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 Reporter:  solarissmoke  |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Template      |    Version:  3.3
 Severity:  minor         |   Keywords:
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 Currently, !WordPress indiscriminately adds an `X-Pingback` header to all
 responses. Similarly all the bundled themes add `link rel="pingback"` to
 all pages.

 The purpose of `X-Pingback` and `link rel="pingback"` is to advertise that
 the current resource supports pingbacks and provide a pingback URL. They
 should only be inserted when the resource actually accepts pingbacks -
 i.e., only when `is_single()` is true, and maybe even only when pings are
 open on that post.

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Ticket URL: <http://core.trac.wordpress.org/ticket/20226>
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