nmap remote HEAD refers to nonexistent ref

[Hilko Bengen]

* Samuel Henrique:

> Hilko, is there any reason we're not hardening nmap? I just enabled it
> here and i'm planing to push it if i don't find any problem, I thought
> its better to ask you first as it may not be enabled yet because of
> some problem you've found.

What extra hardening steps do you have in mind that are not already
enabled by using current dpkg-dev and debhelper?

Cheers,
-Hilko