[PATCH] build: Require gmime >= 2.6.7

[David Bremner]

On Sun, 11 Mar 2012 22:29:46 -0300, David Bremner <david at tethera.net> wrote:
> From: Thomas Jost <schnouki at schnouki.net>
> 
> gmime-2.6 had a bug [1] which made it impossible to tell why a signature
> verification failed when the signer key was unavailable (empty "sigstatus" field
> in the JSON output). Since 00b5623d the corresponding test is marked as broken
> when using gmime-2.6 (2.4 is fine).

After positive feedback from dkg and Domo, pushed, with a corresponding
update to debian/control. 

d