Merge #17691: doc: Add missed copyright headers

fac86ac7b3ceac2f884412c7a9f4bd5bab5e3916 scripted-diff: Add missed copyright headers (Hennadii Stepanov)
6fde9d5e47fc9a1042b3fb68031eab5bf55e508d script: Update EXLUDE list in copyright_header.py (Hennadii Stepanov)
1998152f15fd2b0e83f5068c375a34feaf73db8c script: Add empty line after C++ copyright (Hennadii Stepanov)
071f2fc204f542c5a287ca8835115a2ee0bf2f50 script: Add ability to insert copyright to *.sh (Hennadii Stepanov)

Pull request description:

  This PR improves `contrib/devtools/copyright_header.py` script and adds copyright headers to the files in `src` and `test` directories with two exceptions:
  - [`src/reverse_iterator.h`](https://github.com/bitcoin/bitcoin/blob/master/src/reverse_iterator.h) (added to exceptions)
  - [`src/test/fuzz/FuzzedDataProvider.h`](https://github.com/bitcoin/bitcoin/blob/master/src/test/fuzz/FuzzedDataProvider.h) (added to exceptions)

  On master 5622d8f3156a293e61d0964c33d4b21d8c9fd5e0:
  ```
  $ ./contrib/devtools/copyright_header.py report . | grep zero
    25 with zero copyrights
  ```

  With this PR:
  ```
  $ ./contrib/devtools/copyright_header.py report . | grep zero
     2 with zero copyrights
  ```

  ~I am uncertain about our copyright policy with `build_msvc` and `contrib` directories content, so they are out of scope of this PR.~

ACKs for top commit:
  MarcoFalke:
    ACK fac86ac7b3ceac2f884412c7a9f4bd5bab5e3916

Tree-SHA512: d7832c4a7a1a3b7806119775b40ec35d7982f49ff0e6199b8cee4c0e0a36e68d51728b6ee9924b1c161df4bc6105bd93391b79d42914357fa522f499cb113fa8

10 files changed, 40 insertions, 0 deletions

diff --git a/src/crypto/sha256_avx2.cpp b/src/crypto/sha256_avx2.cpp
index 90a72516a4..624bdb42e4 100644
--- a/src/crypto/sha256_avx2.cpp
+++ b/src/crypto/sha256_avx2.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifdef ENABLE_AVX2
 
 #include <stdint.h>
diff --git a/src/crypto/sha256_sse41.cpp b/src/crypto/sha256_sse41.cpp
index fc79f46f7f..4eaf7d7b18 100644
--- a/src/crypto/sha256_sse41.cpp
+++ b/src/crypto/sha256_sse41.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifdef ENABLE_SSE41
 
 #include <stdint.h>
diff --git a/src/fs.cpp b/src/fs.cpp
index 73fb3b606e..066c6c10d3 100644
--- a/src/fs.cpp
+++ b/src/fs.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <fs.h>
 
 #ifndef WIN32
diff --git a/src/qt/test/addressbooktests.cpp b/src/qt/test/addressbooktests.cpp
index 6e8d383847..176aa7902b 100644
--- a/src/qt/test/addressbooktests.cpp
+++ b/src/qt/test/addressbooktests.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <qt/test/addressbooktests.h>
 #include <qt/test/util.h>
 #include <test/util/setup_common.h>
diff --git a/src/qt/test/addressbooktests.h b/src/qt/test/addressbooktests.h
index 9944750ec8..5de89c7592 100644
--- a/src/qt/test/addressbooktests.h
+++ b/src/qt/test/addressbooktests.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_QT_TEST_ADDRESSBOOKTESTS_H
 #define BITCOIN_QT_TEST_ADDRESSBOOKTESTS_H
 
diff --git a/src/qt/test/util.cpp b/src/qt/test/util.cpp
index ae2fb93bf7..e09f0ad77d 100644
--- a/src/qt/test/util.cpp
+++ b/src/qt/test/util.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <QApplication>
 #include <QMessageBox>
 #include <QPushButton>
diff --git a/src/qt/test/util.h b/src/qt/test/util.h
index 377f07dcba..763847606a 100644
--- a/src/qt/test/util.h
+++ b/src/qt/test/util.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_QT_TEST_UTIL_H
 #define BITCOIN_QT_TEST_UTIL_H
 
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index f6d2816ff8..b4cd7f6bac 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <qt/test/wallettests.h>
 #include <qt/test/util.h>
 
diff --git a/src/qt/test/wallettests.h b/src/qt/test/wallettests.h
index 0a7b57a678..8ee40bf07f 100644
--- a/src/qt/test/wallettests.h
+++ b/src/qt/test/wallettests.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_QT_TEST_WALLETTESTS_H
 #define BITCOIN_QT_TEST_WALLETTESTS_H
 
diff --git a/src/test/blockchain_tests.cpp b/src/test/blockchain_tests.cpp
index 29935c09f8..3b4c480f72 100644
--- a/src/test/blockchain_tests.cpp
+++ b/src/test/blockchain_tests.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <boost/test/unit_test.hpp>
 
 #include <stdlib.h>