Since page templates keep changing, some pages that contained forms with
CSRF token no longer have them.
It leads to some calls of `GetCSRF` returning an empty string, which
fails the tests. Like
3269b04d61/tests/integration/attachment_test.go (L62-L63)
The test did try to get the CSRF token and provided it, but it was
empty.
Remove unused CSRF options, decouple "new csrf protector" and "prepare"
logic, do not redirect to home page if CSRF validation falis (it
shouldn't happen in daily usage, if it happens, redirecting to home
doesn't help either but just makes the problem more complex for "fetch")
Change all license headers to comply with REUSE specification.
Fix#16132
Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
