Followup from #16562 prepare for #16567
* Rename ctx.Form() to ctx.FormString()
* Reimplement FormX func to need less code and cpu cycles
* Move code into own file
* fix: primary email cannot be activated
* Primary email should be activated together with user account when
'RegisterEmailConfirm' is enabled.
* To fix the existing error state. When 'RegisterEmailConfirm' is enabled, the
admin should have permission to modify the activations status of user email.
And the user should be allowed to send activation to primary email.
* Only judge whether email is primary from email_address table.
* Improve logging and refactor isEmailActive
Co-authored-by: zeripath <art27@cantab.net>
* refactor routers directory
* move func used for web and api to common
* make corsHandler a function to prohibit side efects
* rm unused func
Co-authored-by: 6543 <6543@obermui.de>
