[PATCH 02/19] revindex: Export new APIs

From: Vicent Marti Allow users to efficiently lookup consecutive entries that are expected to be found on the same revindex by exporting `find_revindex_position`: this function takes a pointer to revindex itself, instead of looking up the proper revindex for a given packfile on each call. Signed

[PATCH 02/19] revindex: Export new APIs

From: Vicent Marti Allow users to efficiently lookup consecutive entries that are expected to be found on the same revindex by exporting `find_revindex_position`: this function takes a pointer to revindex itself, instead of looking up the proper revindex for a given packfile on each call. Signed