I agree a change is needed but I would use a single error code like CURLE_QUIC_CONNECT_ERROR (in the spirit of CURLE_SSL_CONNECT_ERROR) in place of all the CURLE_FAILED_INIT in that file. The INIT error is intended for library initialization errors. This will remain open to gather feedback. It's the holidays and we're in a feature freeze so regardless this won't move forward right away.

@jay I was also a bit skeptical as SSL is included into Quic...
Ok, I will change it the days.

Have a nice Christmas and a happy new year ;)

@jay Done

Thanks, Merry Christmas to you as well.

CIs are failing:

strerror.c: In function ‘curl_easy_strerror’:
strerror.c:60:3: error: enumeration value ‘CURLE_QUIC_CONNECT_ERROR’ not handled in switch [-Werror=switch]
switch(error) {
^~~~~~

also you'll have to add it to
docs/libcurl/libcurl-errors.3
docs/libcurl/symbols-in-versions
packages/OS400/curl.inc.in

you can change the rest of the CURLE_FAILED_INIT in that file to CURLE_QUIC_CONNECT_ERROR

Done

packages/OS400/curl.inc.in
I'm not really sure about that file, not all error codes are included there. e.g CURLE_HTTP3

I'm not really sure about that file, not all error codes are included there. e.g CURLE_HTTP3

Yes they were missing. I've added them in master, rebased your branch on that and then added CURLE_QUIC_CONNECT_ERROR to os400 as well as a few other changes in description. I have just force-pushed them to your branch.

@jay Thanks

I like the new error code. This PR needs a rebase.

@bagder Rebase done

Thanks