scripted-diff: Move src/kernel/coinstats to kernel::

Introduces a new kernel:: namespace and move all of src/kernel/coinstats
under it.

In the verify script, lines like:

line="$(grep -n 'namespace node {' -- src/kernel/coinstats.h | tail -n1 | cut -d: -f1)"
sed -i -e "${line}s@namespace node {@namespace kernel {@" -- src/kernel/coinstats.h

Are intended to replace only the last instance of "namespace node" with
"namespace kernel", this is to avoid replacing forward declarations of
things inside the node:: namespace.

-BEGIN VERIFY SCRIPT-
sed -E -i 's@namespace node@namespace kernel@g' -- src/kernel/coinstats.cpp

line="$(grep -n 'namespace node {' -- src/kernel/coinstats.h | tail -n1 | cut -d: -f1)"
sed -i -e "${line}s@namespace node {@namespace kernel {@" -- src/kernel/coinstats.h

line="$(grep -n '// namespace node' -- src/kernel/coinstats.h | tail -n1 | cut -d: -f1)"
sed -i -e "${line}s@// namespace node@// namespace kernel@" -- src/kernel/coinstats.h

things='(CCoinsStats|CoinStatsHashType|GetBogoSize|TxOutSer|ComputeUTXOStats)'
git grep -lE 'node::'"$things" | xargs sed -E -i 's@node::'"$things"'@kernel::\1@g'
sed -E -i 's@'"$things"'@kernel::\1@g' -- src/node/coinstats.cpp src/node/coinstats.h
sed -E -i 's@BlockManager@node::\0@g' -- src/kernel/coinstats.cpp
-END VERIFY SCRIPT-

1 files changed, 2 insertions, 2 deletions

diff --git a/src/kernel/coinstats.h b/src/kernel/coinstats.h
index d470ea715a..a15957233f 100644
--- a/src/kernel/coinstats.h
+++ b/src/kernel/coinstats.h
@@ -19,7 +19,7 @@ namespace node {
 class BlockManager;
 } // namespace node
 
-namespace node {
+namespace kernel {
 enum class CoinStatsHashType {
     HASH_SERIALIZED,
     MUHASH,
@@ -73,6 +73,6 @@ uint64_t GetBogoSize(const CScript& script_pub_key);
 CDataStream TxOutSer(const COutPoint& outpoint, const Coin& coin);
 
 std::optional<CCoinsStats> ComputeUTXOStats(CoinStatsHashType hash_type, CCoinsView* view, node::BlockManager& blockman, const std::function<void()>& interruption_point = {});
-} // namespace node
+} // namespace kernel
 
 #endif // BITCOIN_KERNEL_COINSTATS_H