Merge #16314: scripts and tools: Update copyright_header.py script

ca11606 Fix: "Bitcoin Core" -> "The Bitcoin Core" (Hennadii Stepanov)
621463d Drop no-longer-relevant copyright holder name (Hennadii Stepanov)
01fafe5 Include Objective-C source files (Hennadii Stepanov)

Pull request description:

  Now the `copyright_header.py` script handles Objective-C source files `*.mm`:
  ```
  src/qt/macdockiconhandler.mm
  src/qt/macnotificationhandler.mm
  src/qt/macos_appnap.mm
  ```

  Also the only occurrence of `Bitcoin Core Developers` replaced with ubiquitous `The Bitcoin Core developers`.

  EDITED:
  The reason to remove "Sam Rushing" is (on master):
  ```
  $ git grep "Sam Rushing"
  contrib/devtools/copyright_header.py:    "Sam Rushing\n",
  ```

ACKs for top commit:
  laanwj:
    code review ACK ca11606

Tree-SHA512: 446c8fc569f732a6758e765f64110d9faeeffabb69088dd081d7bb730255c87196da96cea51081f4bd49280049fa4ed2ae22091059cb0f89bdc4ef8dd5e63cf0

Author: MarcoFalke

contrib/devtools/copyright_header.py

@@ -34,7 +34,7 @@
     "src/univalue/",
 ]
 
-INCLUDE = ['*.h', '*.cpp', '*.cc', '*.c', '*.py']
+INCLUDE = ['*.h', '*.cpp', '*.cc', '*.c', '*.mm', '*.py']
 INCLUDE_COMPILED = re.compile('|'.join([fnmatch.translate(m) for m in INCLUDE]))
 
 def applies_to_file(filename):
@@ -90,14 +90,12 @@ def compile_copyright_regex(copyright_style, year_style, name):
 EXPECTED_HOLDER_NAMES = [
     "Satoshi Nakamoto\n",
     "The Bitcoin Core developers\n",
-    "Bitcoin Core Developers\n",
     "BitPay Inc\.\n",
     "University of Illinois at Urbana-Champaign\.\n",
     "Pieter Wuille\n",
     "Wladimir J. van der Laan\n",
     "Jeff Garzik\n",
     "Jan-Klaas Kollhof\n",
-    "Sam Rushing\n",
     "ArtForz -- public domain half-a-node\n",
     "Intel Corporation",
     "The Zcash developers",

contrib/devtools/github-merge.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2016-2017 Bitcoin Core Developers
+# Copyright (c) 2016-2017 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -411,4 +411,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-