Documentation: add the Heads project to the list of distributions

As this is a unique, actively maintained project, we should probably
point there too. The text is just copied parts of the http://osresearch.net/
website.

Change-Id: Ib2a8e4b28bc94c5dc6a1ae9388f96ad2c502ccab
Signed-off-by: Martin Kepplinger <martink@posteo.de>
Reviewed-on: https://review.coreboot.org/c/31257
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/Documentation/distributions.md b/Documentation/distributions.md
index 53fbf8677e..fea29e7cb5 100644
--- a/Documentation/distributions.md
+++ b/Documentation/distributions.md
@@ -66,3 +66,16 @@ set of devices, and uses SeaBIOS as the payload to support Legacy BIOS booting.
 His firmware images are significantly older, and not actively maintained or
 supported, but worth a look if you need Legacy Boot support and is not
 available via Mr Chromebox's firmware.
+
+### Heads
+
+[Heads](http://osresearch.net) is an open source custom firmware and OS
+configuration for laptops and servers that aims to provide slightly better
+physical security and protection for data on the system. Unlike
+[Tails](https://tails.boum.org/), which aims to be a stateless OS that leaves
+no trace on the computer of its presence, Heads is intended for the case where
+you need to store data and state on the computer.
+
+Heads is not just another Linux distribution – it combines physical hardening
+of specific hardware platforms and flash security features with custom coreboot
+firmware and a Linux boot loader in ROM.