[PATCH 4 of 6] revlog: add functions that use ancestor.lazyancestorset

[Siddharth Agarwal]

On 12/14/2012 12:58 PM, Kevin Bullock wrote:
> Are these actually going to be useful on _all_ revlogs, or should they 
> go on changelog? So far the only uses I see are on changelog.

I added them right below the ancestors and incancestors functions that 
already exist. (After discussing this with Bryan, I guess that that's 
really an argument for moving everything out to changelog.)