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

22 files changed, 89 insertions, 8 deletions

diff --git a/build_msvc/bitcoin_config.h b/build_msvc/bitcoin_config.h
index e892765fd..3e8cca154 100644
--- a/build_msvc/bitcoin_config.h
+++ b/build_msvc/bitcoin_config.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_BITCOIN_CONFIG_H
 #define BITCOIN_BITCOIN_CONFIG_H
 
diff --git a/build_msvc/msvc-autogen.py b/build_msvc/msvc-autogen.py
index 395143840..d99b17d38 100644
--- a/build_msvc/msvc-autogen.py
+++ b/build_msvc/msvc-autogen.py
@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# Copyright (c) 2016-2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 import os
 import re
diff --git a/build_msvc/testconsensus/testconsensus.cpp b/build_msvc/testconsensus/testconsensus.cpp
index 0068f588c..571d19957 100644
--- a/build_msvc/testconsensus/testconsensus.cpp
+++ b/build_msvc/testconsensus/testconsensus.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 <iostream>
 
 // bitcoin includes.
diff --git a/contrib/devtools/circular-dependencies.py b/contrib/devtools/circular-dependencies.py
index 2e4657f1d..6afa4351e 100755
--- a/contrib/devtools/circular-dependencies.py
+++ b/contrib/devtools/circular-dependencies.py
@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# 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.
 
 import sys
 import re
diff --git a/contrib/devtools/copyright_header.py b/contrib/devtools/copyright_header.py
index 5307b0419..1b71245aa 100755
--- a/contrib/devtools/copyright_header.py
+++ b/contrib/devtools/copyright_header.py
@@ -19,6 +19,8 @@ EXCLUDE = [
     'src/qt/bitcoinstrings.cpp',
     'src/chainparamsseeds.h',
     # other external copyrights:
+    'src/reverse_iterator.h',
+    'src/test/fuzz/FuzzedDataProvider.h',
     'src/tinyformat.h',
     'test/functional/test_framework/bignum.py',
     # python init:
@@ -455,14 +457,14 @@ CPP_HEADER = '''
 def get_cpp_header_lines_to_insert(start_year, end_year):
     return reversed(get_header_lines(CPP_HEADER, start_year, end_year))
 
-PYTHON_HEADER = '''
+SCRIPT_HEADER = '''
 # Copyright (c) %s The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 '''
 
-def get_python_header_lines_to_insert(start_year, end_year):
-    return reversed(get_header_lines(PYTHON_HEADER, start_year, end_year))
+def get_script_header_lines_to_insert(start_year, end_year):
+    return reversed(get_header_lines(SCRIPT_HEADER, start_year, end_year))
 
 ################################################################################
 # query git for year of last change
@@ -491,17 +493,18 @@ def file_has_hashbang(file_lines):
         return False
     return file_lines[0][:2] == '#!'
 
-def insert_python_header(filename, file_lines, start_year, end_year):
+def insert_script_header(filename, file_lines, start_year, end_year):
     if file_has_hashbang(file_lines):
         insert_idx = 1
     else:
         insert_idx = 0
-    header_lines = get_python_header_lines_to_insert(start_year, end_year)
+    header_lines = get_script_header_lines_to_insert(start_year, end_year)
     for line in header_lines:
         file_lines.insert(insert_idx, line)
     write_file_lines(filename, file_lines)
 
 def insert_cpp_header(filename, file_lines, start_year, end_year):
+    file_lines.insert(0, '\n')
     header_lines = get_cpp_header_lines_to_insert(start_year, end_year)
     for line in header_lines:
         file_lines.insert(0, line)
@@ -513,8 +516,8 @@ def exec_insert_header(filename, style):
         sys.exit('*** %s already has a copyright by The Bitcoin Core developers'
                  % (filename))
     start_year, end_year = get_git_change_year_range(filename)
-    if style == 'python':
-        insert_python_header(filename, file_lines, start_year, end_year)
+    if style in ['python', 'shell']:
+        insert_script_header(filename, file_lines, start_year, end_year)
     else:
         insert_cpp_header(filename, file_lines, start_year, end_year)
 
@@ -555,11 +558,13 @@ def insert_cmd(argv):
     if not os.path.isfile(filename):
         sys.exit("*** bad filename: %s" % filename)
     _, extension = os.path.splitext(filename)
-    if extension not in ['.h', '.cpp', '.cc', '.c', '.py']:
+    if extension not in ['.h', '.cpp', '.cc', '.c', '.py', '.sh']:
         sys.exit("*** cannot insert for file extension %s" % extension)
 
     if extension == '.py':
         style = 'python'
+    elif extension == '.sh':
+        style = 'shell'
     else:
         style = 'cpp'
     exec_insert_header(filename, style)
diff --git a/contrib/devtools/gen-manpages.sh b/contrib/devtools/gen-manpages.sh
index dbdb62287..aa65953d8 100755
--- a/contrib/devtools/gen-manpages.sh
+++ b/contrib/devtools/gen-manpages.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2016-2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C
 TOPDIR=${TOPDIR:-$(git rev-parse --show-toplevel)}
diff --git a/contrib/filter-lcov.py b/contrib/filter-lcov.py
index df1db76e9..75034616f 100755
--- a/contrib/filter-lcov.py
+++ b/contrib/filter-lcov.py
@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# Copyright (c) 2017-2018 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 import argparse
 
diff --git a/contrib/gitian-build.py b/contrib/gitian-build.py
index e38fa6fcb..ade9e00d1 100755
--- a/contrib/gitian-build.py
+++ b/contrib/gitian-build.py
@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# 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.
 
 import argparse
 import os
diff --git a/contrib/install_db4.sh b/contrib/install_db4.sh
index 4b848dda9..e9130a21d 100755
--- a/contrib/install_db4.sh
+++ b/contrib/install_db4.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+# 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.
 
 # Install libdb4.8 (Berkeley DB).
 
diff --git a/src/crypto/sha256_avx2.cpp b/src/crypto/sha256_avx2.cpp
index 90a72516a..624bdb42e 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 fc79f46f7..4eaf7d7b1 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 73fb3b606..066c6c10d 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 6e8d38384..176aa7902 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 9944750ec..5de89c759 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 ae2fb93bf..e09f0ad77 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 377f07dcb..763847606 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 f6d2816ff..b4cd7f6ba 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 0a7b57a67..8ee40bf07 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 29935c09f..3b4c480f7 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>
diff --git a/test/functional/combine_logs.py b/test/functional/combine_logs.py
index a70d9c4ac..00f2833f5 100755
--- a/test/functional/combine_logs.py
+++ b/test/functional/combine_logs.py
@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# 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.
 """Combine logs from multiple bitcoin nodes as well as the test_framework log.
 
 This streams the combined log output to stdout. Use combine_logs.py > outputfile
diff --git a/test/lint/lint-locale-dependence.sh b/test/lint/lint-locale-dependence.sh
index c1a05fc94..35e58c2df 100755
--- a/test/lint/lint-locale-dependence.sh
+++ b/test/lint/lint-locale-dependence.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# 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.
 
 export LC_ALL=C
 KNOWN_VIOLATIONS=(
diff --git a/test/lint/lint-shebang.sh b/test/lint/lint-shebang.sh
index fda22592d..a666fdfec 100755
--- a/test/lint/lint-shebang.sh
+++ b/test/lint/lint-shebang.sh
@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+# 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.
+
 # Assert expected shebang lines
 
 export LC_ALL=C