.arcconfig

flagutil: introduce a flagprocessorsmixin class

To avoid code duplication, we will provide a simple "ready to use" mixin that
carry the appropriate logic. First we use it in standard revlog, we'll remove
code duplication in later changesets.

Differential Revision: https://phab.mercurial-scm.org/D6796

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    "base": "hg:.^"
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