Bug#851357: Regression: No longer supports ServerName containing underscore
No, the *[ ... ] syntax means an arbitrary number of the thing in the
Ah, I didn't notice the * on the <hname> line - my bad
I don't think underscores in domain names are allowed in general
Not according to the original specification:
But according to a later RFC:
any binary string whatever can be used as the label of any
I've read that some of the IDNA rfcs added i18n for hostnames too which
resulted in making "_" legal there too but I couldn't find that anywhere
Enabling HTTPProtocolOptions unsafe on the virtualhost doesn't work so
you need to enable it on the global apache config - and the
documentation notes it's "strongly cautioned against"
But arguing over the interpretation of different specifications is
unimportant - as you mentioned underscores are widely in use right now,
and as Ondrej agreed it's a bad idea to have such a huge breaking change
whether it's intended or not.