Replace the CLA with the DCO, simply requiring a Signed-off-by:

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

DCO1.1.txt

@@ -0,0 +1,25 @@
+Developer's Certificate of Origin 1.1
+
+       By making a contribution to this project, I certify that:
+
+       (a) The contribution was created in whole or in part by me and I
+           have the right to submit it under the open source license
+           indicated in the file; or
+
+       (b) The contribution is based upon previous work that, to the best
+           of my knowledge, is covered under an appropriate open source
+           license and I have the right under that license to submit that
+           work with modifications, whether created in whole or in part
+           by me, under the same open source license (unless I am
+           permitted to submit under a different license), as indicated
+           in the file; or
+
+       (c) The contribution was provided directly to me by some other
+           person who certified (a), (b) or (c) and I have not modified
+           it.
+
+       (d) I understand and agree that this project and the contribution
+           are public and that a record of the contribution (including all
+           personal information I submit with it, including my sign-off) is
+           maintained indefinitely and may be redistributed consistent with
+           this project or the open source license(s) involved.

README

@@ -70,6 +70,9 @@ How to contribute?
 ------------------
 The mailing list for libtpms is libtpms@googlegroups.com.
 
+For patch submissions, please use a Signed-off-by: <your email> to indicate
+agreement to the DCO1.1.txt.
+
 
 Maintainers
 -----------