Sean Gilligan

Warning from JDK about `sun.misc.Unsafe` being called from `protobuf-javalite`

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**bitcoinj** can build and run tests with Java 24 according to testing I did today with `Temurin-24.0.1+9` and Gradle 8.14. However there is a warning from the build: ``` WARNING:...

This contains a preliminary commit to simplify the JavaDoc of `ClientConnectionManager` before updating the comment as part of the main commit.

HDPath: add `Prefix.M` and `Prefix.m` shortcuts

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~~2 commits, child of PR #3719 ~~

Improve the handling of the (positive or negative) excess connections in 3 commits The variable `adjustment` was renamed to `excessConnections` and its sign was flipped. This makes the code more...

ListMessage: member `items` to abstract method `items()`

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This will allow us to make `ListMessage` an `interface` (if we make `BaseMessage` an interface)

Block: Simplify messageSize() with ternary

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~~Child of PR #3665~~

`assertThat()` is deprecated and replaced by `MatcherAssert.assertThat()` Fixes two deprecation warnings in tests.