[SLOF] [PATCH slof] documentation: Add a clause about signing off

[Alexey Kardashevskiy]

This adds a reference to the Developer Certificate of Origin to tell
people that they have to sign their work and the consequences it implies.

Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---

Please comment english and use of that certificate. Thanks.

I am pasting SLOF license (which is BSD style) below for convenience.

[aik at vpl2 slof]$ cat LICENSE
Copyright (c) 2004, 2008 IBM Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of IBM nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---
 README | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README b/README
index fe3f6ff..7895045 100644
--- a/README
+++ b/README
@@ -242,6 +242,9 @@ To add primitives:
 
 Patches for SLOF should be made against https://github.com/aik/SLOF,
 the master branch and posted to slof at lists.ozlabs.org.
+The patches must be signed using "Signed-off-by" tag with a real name to
+confirm that you certify the Developer Certificate of Origin  Version 1.1,
+see [3] for details.
 
 
 Documentation
@@ -252,3 +255,6 @@ Documentation
 
 [2] PAPR Standard, Power.org(TM) Standard for Power Architecture(R) Platform
     Requirements (Workstation, Server), Version 2.4, December 7, 2009
+
+[3] Developer Certificate of Origin Version 1.1
+    http://developercertificate.org/
-- 
2.5.0.rc3