Cannot use : character in username

[jrohel]

The same problem is in the old libdnf (affects DNF4, microdnf, PackageKit, ...). Because both projects use librepo.
Librepo uses libcurl. To set the username and password librepo uses the old libcurl API option CURLOPT_USERPWD.

Suggested fix:
Extend librepo API. The new librepo API will use the new libcurl API options CURLOPT_USERNAME and CURLOPT_PASSWORD.
Modify dnf5 to use the new librepo API.

[ppisar]

Or you can enhance librepo to recognize "::" as literal ":", split on the single ":" and pass username and password to libcurl with separate calls.

[jrohel]

Or you can enhance librepo to recognize "::" as literal ":", split on the single ":" and pass username and password to libcurl with separate calls.

LRO_USERPWD is not consistent with LRO_PROXYUSERPWD. And after the proposed modification, it would no longer be consistent with libcurl behavior either.

I prepared a PR rpm-software-management/librepo#316 and added LRO_USERNAME and LRO_PASSWORD following the libcurl approach.