Reviewed-by: Jay Satiro Reviewed-by: Daniel Stenberg Closes https://github.com/curl/curl/pull/5452
... and whitelisted a few more files in the the copyright.pl script.
Reported by the new script 'scripts/copyright.pl'. The script has a regex whitelist for the files that don't need copyright headers. Removed three (mostly usesless) README files from docs/ Closes #5141