docs/install/bbb_ehci.html: re-license to GFDL

I received the authors permission to change the license, via IRC
and email messages.

IRC log (#libreboot freenode IRC) on 11 July 2015:
<francis7> tty0_, I sent you an email.
<francis7> (your gmail address)
<tty0_> There isn't that much work of mine there, and i am ok
with what you will decide. But i would protest GFDL if i was in
your place
<francis7> tty0_, does this mean that you accept GFDL?
<tty0_> I give you permission to do it if you decide that it is
the best option for libreboot

2 files changed, 37 insertions, 431 deletions

diff --git a/docs/cc-by-sa-4.txt b/docs/cc-by-sa-4.txt
deleted file mode 100644
index c333481..0000000
--- a/docs/cc-by-sa-4.txt
+++ /dev/null
@@ -1,426 +0,0 @@
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diff --git a/docs/install/bbb_ehci.html b/docs/install/bbb_ehci.html
index 45fc68f..3cdda48 100644
--- a/docs/install/bbb_ehci.html
+++ b/docs/install/bbb_ehci.html
@@ -466,14 +466,46 @@ cat /dev/ttyGS0
 
 		<p>
 			Copyright &copy; 2015 Alex David &lt;opdecirkel@gmail.com&gt;<br/>
-			This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
-			A copy of the license can be found at <a href="../cc-by-sa-4.txt">../cc-by-sa-4.txt</a>.
+			Permission is granted to copy, distribute and/or modify this document
+			under the terms of the GNU Free Documentation License, Version 1.3
+			or any later version published by the Free Software Foundation;
+			with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+			A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a>
 		</p>
 
 		<p>
-			This document is distributed in the hope that it will be useful,
-			but WITHOUT ANY WARRANTY; without even the implied warranty of
-			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../cc-by-sa-4.txt">../cc-by-sa-4.txt</a> for more information.
+			Updated versions of the license (when available) can be found at
+			<a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a>
+		</p>
+
+		<p>
+			UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
+			EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
+			AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
+			ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
+			IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
+			WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
+			PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
+			ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
+			KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
+			ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
+		</p>
+		<p>
+			TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
+			TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
+			NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
+			INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
+			COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
+			USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
+			ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
+			DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
+			IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
+		</p>
+		<p>
+			The disclaimer of warranties and limitation of liability provided
+			above shall be interpreted in a manner that, to the extent
+			possible, most closely approximates an absolute disclaimer and
+			waiver of all liability.
 		</p>
 		
 	</div>