`make check` fails to verify the XML.

$ make check
make  check-local
make[1]: Entering directory '/data/src/mobile-broadband-provider-info'
xmllint --valid ./serviceproviders.xml 2>&1 > /dev/null || exit 1;
./serviceproviders.xml:6051: element apn: validity error : Element apn content does not follow the DTD, expecting (plan* , usage? , name* , gateway? , username? , password? , authentication? , dns* , mmsc? , mmsproxy?), got (usage name mmsc mmsproxy authentication )
                        </apn>
                              ^
make[1]: *** [Makefile:628: check-local] Error 1
make[1]: Leaving directory '/data/src/mobile-broadband-provider-info'
make: *** [Makefile:500: check-am] Error 2



seems something wrong with the <authentication>, but I don't see what.

Also, could you be a bit more descriptive in the commit message? Do you have some web links to the site of the provider?


Thanks.

Both UPC Mobil and Netfone are MVNOs, and both provider uses Vodafone's network.
Websites:
UPC: https://www.upc.hu/mobil/, internet settings: http://ugyfelszolgalat.upc.hu/app/answers/detail/a_id/698, mms settings available via https://www.upc.hu/ugyfelszolgalat/szolgaltatasok-hasznalata/keszulekbeallitas/
Netfone: http://www.netfone.hu/, internet and mms settings: http://www.netfone.hu/apn-beallitas/

Created attachment 360235 [details] [review]
Updated patch: removed duplicated "Netfone MMS" entry.

This also causes xmllint error, but I don't know why.
What is bad with "<authentication method="pap"/>"?

bugzilla.gnome.org is being shut down in favor of a GitLab instance. 
We are closing all old bug reports and feature requests in GNOME Bugzilla which have not seen updates for a long time.

If you still use NetworkManager and if you still see this bug / want this feature in a recent and supported version of NetworkManager, then please feel free to report it at https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/

Thank you for creating this report and we are sorry it could not be implemented (workforce and time is unfortunately limited).