* added dendrite captcha options
* added hcaptcha doc
* proper url
* Apply suggestions from code review
Co-authored-by: Slavi Pantaleev <slavi@devture.com>
* Update main.yml
* renamed captcha vars to new naming scheme
* change vars to new format
* Rename back some incorrect renamed variables
These variables are either not just part of the `client_api` subsection,
or are not even part of that section at all. They shouldn't have been
renamed in baaef2ed616e2645550d9
* Fix up naming inconsistencies
Some of these variables had been renamed in one place,
but not in other places, so it couldn't have worked that way.
* Add validation/deprecation for renamed Dendrite variables
Related to 4097898f885cf4c73, baaef2ed616e2645550, 68f4418092fa8ad
and a0b4a0ae6b2f1f18
Co-authored-by: Slavi Pantaleev <slavi@devture.com>
