Log Message:
tex-changes{,-doc}: update to 4.1.0

4.1.0 makes the list of changes clickable.
4.0.4 adds missing regression.dtx to ctan archive; no code change.
4.0.3 is a bugfix release for a compile error with cite command with final option.
4.0.2 is a bugfix release of the documentation.
4.0.1 is a bugfix release for problems with chapters.