hg dump and import?

[Arun Sharma]

I have a repo that was created before the permission tracking changes 
went into hg. I've been updating it every night to track an upstream
tree. File permissions look ok in the tree where I do the nightly
import.

But when I merge it into a branch, file permissions are wrong (x bit is
gone). I can't reproduce this behavior using a test case.

So probably the right thing to do is, dump the old repo and reimport it
with the latest version of hg to see if the problem goes away. Is this
feature implemented?

	-Arun