Register an user using email verification [Since XWiki 11.6 RC1]

Preconditions: Mail Sending must be configured (Administer Wiki > Mail > Mail Sending).

1. Login as Admin
2. Go to Users & Rights > Registration
3. Set 'Use Email Verification' to Yes and 'Save'
4. Logout
5. Click Drawer > Register
6. Fill in the fields (use a valid email address)
7. Click 'Register'
8. Check the mail received by the user
9. Click on the link
10. Click 'login' link
11. Logout
12. Click Drawer > Register
13. Fill in the fields for another user (can be used the same email address)
14. Click 'Register'
15. Click 'Login'
16. Check the mail received by the user
17. Copy the Validation Key (like .../xwiki/bin/view/XWiki/AccountValidation?validkey=ynIolrpgYAn6Blmq&xwikiname=U8)
18. Go to the wiki page and paste it in the form
19. Click 'Confirm account'
20. Click 'login' link