Copyright for dtfabric source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: dtfabric
Source: https://github.com/libyal/dtfabric

Files: *
Copyright: 2016-2018, Joachim Metz 
License: Apache-2.0

Files: documentation/*
Copyright: 2016-2018, Joachim Metz 
License: GFDL-NIV-1.3+

Files: debian/*
Copyright: 2018, SZ Lin (林上智) 
           2018, Hilko Bengen 
License: Apache-2.0

License: Apache-2.0
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at
 .
      http://www.apache.org/licenses/LICENSE-2.0
 .
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 .
 On Debian systems, the full text of the Apache Software License version 2 can
 be found in the file `/usr/share/common-licenses/Apache-2.0'.

License: GFDL-NIV-1.3+
 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 is included
 in the section entitled "GNU Free Documentation License".
 ....
 .
 [preface]
 .
 On Debian systems, the complete text of the GNU Free Documentation License
 Version 1.3 can be found in `/usr/share/common-licenses/GFDL-1.3'.