doc: add missing copyright headers #31864

1. 
   fanquake commented at 3:44 pm on February 14, 2025: member

   Add & amends a number of copyright headers. Remove some now obselete doc/code.
2. contrib: remove GPL-3+ from debian/copyright

   This is unused.

   021030bac8
3. contrib: remove outdated entries from copyright_header.py 47c83e7802
4. doc: add & amend copyright headers 01b9a6183e
5. 
   DrahtBot commented at 3:44 pm on February 14, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/31864.

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   ACK	i-am-yuvi, l0rinc

   If your review is incorrectly listed, please react with 👎 to this comment and the bot will ignore it on the next update.

6. DrahtBot added the label Docs on Feb 14, 2025
7. 
   i-am-yuvi commented at 8:46 am on February 16, 2025: contributor

   ACK 01b9a6183eb58dffac00f053e2742d924c84c721
8. in contrib/devtools/copyright_header.py:25 in 01b9a6183e

   21@@ -22,7 +22,6 @@
   22     'src/test/fuzz/FuzzedDataProvider.h',
   23     'src/tinyformat.h',
   24     'src/bench/nanobench.h',
   25-    'test/functional/test_framework/bignum.py',
   

   ---

   ---

   

   l0rinc commented at 12:10 pm on February 18, 2025:

   👍 was removed in https://github.com/bitcoin/bitcoin/commit/3ed772d2219e58d6afea3d12c0ebebb8487445e7
9. in src/bench/parse_hex.cpp:1 in 01b9a6183e

   0@@ -1,4 +1,4 @@
   1-// Copyright (c) 2024- The Bitcoin Core developers
   2+// Copyright (c) 2024-present The Bitcoin Core developers
   

   ---

   ---

   

   l0rinc commented at 12:34 pm on February 18, 2025:

   How were these files chosen for update? I see that many other headers are missing the -present part:

   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/node/abort.cpp#L1
   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/common/args.h#L1
   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/bech32.h#L2

   and many others have a older end year:

   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/bech32.cpp#L2
   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/init/bitcoind.cpp#L1
   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/ci/test/00_setup_env.sh#L3

   or don’t even contain a year:

   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/ci/lint_imagefile#L1

   or have the SPDX header only:

   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/test/fuzz/FuzzedDataProvider.h#L5

   or don’t have any copyright header:

   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/test/lint/lint_ignore_dirs.py#L1
   • https://github.com/bitcoin/bitcoin/blob/01b9a6183eb58dffac00f053e2742d924c84c721/src/univalue/include/univalue_escapes.h#L1

   etc.

10. in contrib/devtools/copyright_header.py:97 in 01b9a6183e

    92@@ -94,7 +93,6 @@ def compile_copyright_regex(copyright_style, year_style, name):
    93     r"Satoshi Nakamoto",
    94     r"The Bitcoin Core developers",
    95     r"BitPay Inc\.",
    96-    r"University of Illinois at Urbana-Champaign\.",
    

    ---

    ---

    

    l0rinc commented at 12:48 pm on February 18, 2025:

    Only found these in Python dependencies, so: 👍

    Unrelated: we could update the script to change the end year to present instead

    ---

    

    fanquake commented at 6:44 pm on February 20, 2025:

    I have changes for this locally, but the value is low, and ideally all of this code will soon be removed.
11. l0rinc approved
12. 
    l0rinc commented at 12:48 pm on February 18, 2025: contributor

    While I admit having stronger feelings against the copyright headers than I should (noise + bikeshedding + revoking right to copy in general), I do value consistency, so it’s a 👍 from me - I wish we could unify more to get rid of this extra source of disagreement, but this PR makes it a bit better, so:

    ACK 01b9a6183eb58dffac00f053e2742d924c84c721

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fanquake DrahtBot i-am-yuvi l0rinc

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