Please review wip/grub2

Hi,

I've updated wip/grub2 to the latest release (1.99).  The package
has been tested on NetBSD 5.99.47 (i386), NetBSD 5.1 (amd64) and
Debian GNU/Linux (wheezy/sid).

The makefile is a bit more complex than it should, since the
package name, the commands, manuals, etc. are renamed from `grub'
to `grub2', to avoid conflict with sysutils/grub.

There is a single patch file that applies the same fix to a bunch
of scripts.  IMO, keeping all these changes in the same patch file
improves readability.  But I can split the patch in 10 patches if
that's the way to go.

Comments welcome,

Grégoire

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