convert symlinks with convert-repo

[Alexis S. L. Carvalho]

Thus spake Daniel Holth:
> # HG changeset patch
> # User Daniel Holth <dholth at fastmail.fm>
> # Date 1170216546 18000
> # Node ID e4e6eef8938f71bc93e9d1a7c3be5e8a97a56d55
> # Parent  82eb0fafb56d5767af52ed60cd272311675b547f
> convert-repo converts symlinks from git

I've pushed this to crew, thanks.  (Setting mutt's pipe_decode option
took care of the patch mangling).

Alexis