Upper-case characters not allowed in domain names

[sbernauer]

Affected version

main

Current and expected behavior

Users are getting error messages such as
the given hostname "FOO.BAR" is not a valid hostname, which needs to be either a domain name or IP address

Semms like this has worked in the past (nor certain what SDP version exactly).
IMHO RFC 1035 allows such domains, so we should relax our regexes.

Possible solution

No response

Additional context

No response

Environment

No response

Would you like to work on fixing this bug?

None

[nightkr]

Generally, DNS hostnames are expected to be case-insensitive. Just use foo.bar instead. Your browser won't allow you to go to https://GOOGLE.COM either.

[nightkr]

Then again, lower-casing it out of the box shouldn't cost much...