By making them look less like http headers, the hyper mode "tweak"
doesn't interfere.
Enable test 2002 and 2003 in hyper builds (and 1280 which is unrelated
but should be enabled).
Closes#7658
- Add tests.
- Add an example to CURLOPT_TFTP_NO_OPTIONS.3.
- Add --tftp-no-options to expose CURLOPT_TFTP_NO_OPTIONS.
Bug: https://github.com/curl/curl/issues/481