Merge bitcoin/bitcoin#34106: doc: add missing copyright headers

aeb7ccb937 doc: add missing copyright headers (fanquake)
68a7cb8f8b contrib: output copyright in generate-seeds.py (fanquake)

Pull request description:

  Takes care of some queries from #34084.

ACKs for top commit:
  rkrux:
    tACK aeb7ccb937
  janb84:
    ACK aeb7ccb937

Tree-SHA512: 12bb8fe58e0e84d4e1dcba94f95da2ebb0518208023459cb8ca81c1f95715749a6009cda8fe140dcde809fe35bdae10ee55b5eeea2cacfa30c58b1caefb2b521

contrib/seeds/generate-seeds.py

@@ -160,6 +160,9 @@ def main():
         sys.exit(1)
     g = sys.stdout
     indir = sys.argv[1]
+    g.write('// Copyright (c) The Bitcoin Core developers\n')
+    g.write('// Distributed under the MIT software license, see the accompanying\n')
+    g.write('// file COPYING or https://opensource.org/license/mit.\n\n')
     g.write('#ifndef BITCOIN_CHAINPARAMSSEEDS_H\n')
     g.write('#define BITCOIN_CHAINPARAMSSEEDS_H\n')
     g.write('/**\n')

src/test/caches_tests.cpp

@@ -1,3 +1,7 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit.
+
 #include <node/caches.h>
 #include <util/byte_units.h>
 

src/test/kernel/block_data.h

@@ -1,3 +1,7 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit.
+
 #ifndef BITCOIN_TEST_KERNEL_BLOCK_DATA_H
 #define BITCOIN_TEST_KERNEL_BLOCK_DATA_H
 #include <array>