license: Update license files for Github to detect it

Rename EPL-2 license file and replace EDL-1 with BSD-3-Clause.

LICENSE.BSD-3-Clause

@@ -0,0 +1,27 @@
+Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors. 
+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 the Eclipse Foundation, Inc. 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 HOLDER 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.md

@@ -16,7 +16,14 @@ supported anymore.
 [CVE-2019-9004]: https://www.cve.org/CVERecord?id=CVE-2019-9004
 [CVE-2021-41040]: https://www.cve.org/CVERecord?id=CVE-2021-41040
 
+## License
+
+This work is dual-licensed under the Eclipse Public License v2.0 and Eclipse Distribution License v1.0.
+
+`SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause`
+
 ## Badges
+
 [![Build](https://github.com/eclipse/wakaama/actions/workflows/build_and_test.yaml/badge.svg)](https://github.com/eclipse/wakaama/actions/workflows/build_and_test.yaml)
 
 ## Source Layout