[PATCH 1 of 2] acl: add support for branch-based access control; more informative messages

[Matt Mackall]

On Fri, 2010-04-30 at 20:29 -0300, Elifarley Callado Coelho Cruz wrote:
> Checking for branch violations first can spare us from performing
> unnecessary file-by-file checks.
> The first invalid branch access will abort the branch-checking loop,
> preventing the file-checking loop from starting.

The bulk of the actual work is probably in decompressing changelog
entries, at which point you have both their branch name and files list
handy, so decompressing them twice is discouraged.


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