781ebbec8a
bootstrap major change detection implementation The use of `changelog-seen` and `bootstrap/CHANGELOG.md` has not been functional in any way for many years. We often do major/breaking changes but never update the changelog file or the `changelog-seen`. This is an alternative method for tracking major or breaking changes and informing developers when such changes occur. Example output when bootstrap detects a major change:  |
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| .. | ||
| _helper.rs | ||
| main.rs | ||
| rustc.rs | ||
| rustdoc.rs | ||
| sccache-plus-cl.rs | ||