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Strip rdfrom parameter in canonical urls
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When following an interwiki redirect (e.g., the target page has a query parameter rdfrom.

This is included (just like any other query parameter is by default) in the canonical url:

<link rel="canonical" href="" />

For normal redirect, we strip them.

E.g. displays "Runway (fashion)" with a "(Redirected from Catwalk)" message, but outputs:

<link rel="canonical" href="" />

Removing any trace of the redirect.

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Krinkle raised the priority of this task from to Needs Triage.
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Hm... our handling is rather inconsistent. If the redirect had any query parameters, those end up stripped as well:

<link rel="canonical" href="" />

<link rel="canonical" href="" />