* New captcha.sh question/answer based
* Keep original CAPTCHA script
Rather than replacing the original CAPTCHA script, keep it next to the
new one, for the moment.
* CAPTCHA-ng script cleanup
* remove various bashisms
* replace all echos with printf
+ add quotations to many variables
Co-authored-by: Adrien Bourmault <neox@os-k.eu>
Co-authored-by: nico wellpott <nico@magicbroccoli.de>