Guix IceCat users have had early access to security fixes

[Mark H Weaver]

Yesterday, Mozilla released Firefox ESR 45.6 and announced several CVEs
fixed by it:

  https://www.mozilla.org/en-US/security/advisories/mfsa2016-95/

I'm pleased to announce that Guix users of IceCat have had early access
all of these fixes.

Since November 30 (commit 9689e71d2f2b5e766415a40d5f5ab267768d217d),
we've had fixes for CVE-2016-9897, CVE-2016-9898, CVE-2016-9899,
CVE-2016-9900, CVE-2016-9904, and 4 out of 11 patches for CVE-2016-9893.

Since December 3 (commit 5bdec7d634ce0058801cd212e9e4ea56e914ca0c),
we've had the fixes that were later announced as CVE-2016-9901,
CVE-2016-9902, CVE-2016-9905, and another patch for CVE-2016-9893.

On December 10 (commit 56c394ee4397015d6144dab002ee43fc7e32a331), I
cherry-picked the remaining fixes from the not-yet-released Firefox
ESR 45.6: CVE-2016-9895, and the final six patches for CVE-2016-9893.

      Mark