text: Title: Feature request: Change ReCaptcha to another service
  Body: 
  ## Use case
  
  The public server for wger uses Recaptcha for their captcha. Recaptcha by google is not very privacy friendly and is needed to be used to register a new account. Switching to another captcha provider that respects privacy more would fit better with the project.
       
  ## Proposal
  
  I would like wger to swap the use of recaptcha for registering an account to another captcha service, something like [hCaptcha](https://www.hcaptcha.com/).
  
       
  