Add Captchas section

[sergimn]

Captcha

• Captcha - Completely Automated Public Turing test to tell Computers and Humans Apart
• Why do you think this helps users privacy?: The current trend is to use reCAPTCHA by Google. It would be nice to offer other options to developers for more privacy or ethically friendly alternatives.
• Under what section should this service be listed?: It should be a new section
• Additional comments / info: One proposal to inaugurate the section, even though it may not fit perfectly in this list, is hCAPTCHA. They sell themselves as a privacy friendly drop-in replacement for reCAPTCHA More services need to be searched and make sure they comply with a good privacy policy

[pluja]

I added the section. I would like to have some discussion about listing hCAPTCHA and friendlycaptcha, both advertise themselves as privacy-friendly captcha alternatives.

[ryvwel]

@pluja why didn't you add friendly captcha?