[chord] libadb::remove

[Tung Thanh Nguyen]

Hi,
I am working on adding a new funtion which need to remove a stored block from the Chord. I noticed that there's a method adb::remove on your libadb.C. However, when I invoked this method, I got an error in the "assert (!hasaux_);" statement. What does this "hasaux_" property mean? Is it used to maintain the consistency between stored blocks/fragments (replicas)contained in different chord nodes? 
Thanks
TT