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ICU-23054 Fix copyright scanner; fix terms of use
ICU-23231 Update scrub script for robustness and clarity
ICU-21424 Migrate bldicures.py to Python 3
ICU-21248 Adds line ending check to Travis CI check. The eol check fits quite well into what the script is doing already. Note that one file, 'testrunner.cmd', contains \r, which seems to be acceptable since it is a Windows file.
ICU-13358 Fixed cpyscan problems. Enhanced cpyscan.pl to use online version of cpyskip.txt by default. Added the new Unicode copyright comment in many tools files.
ICU-21555 Fix typos in repo from letter d to i
ICU-23055 Update outdated site.icu-project.org URLs.