Add revlog.parentrevs function. This allows one to walk the revision graph using only revision numbers, which can be faster than using revision hashes, especially for RevlogNG, where the parents of a revision are stored as revision numbers.

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#header#

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    <title>#repo|escape# Changelog</title>

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    <description>#repo|escape# Changelog</description>

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    #entries%changelogentry#

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  </channel>

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</rss>