HEADS UP: more namecache work going in

[Matthew Dillon]

    The namecache work is starting to change existing interfaces and add
    new ones, and some instability may result.

    Possible forms of instability: memory leaks in the vfs cache or panics
    due to lost reference counts, namespace confusion.  I don't expect
    any filesystem corruption, however, since the vnode subsystem is largely
    being left intact.

						-Matt