Increase severity for accepted and rejected connections to the domain

[daleglass]

Having them as debug just seems too subtle. People will often want to notice these.

[JulianGro]

It looks like the domain server will always throw a Refusing connection from node at at least once even if a connection succeeds. So what does this actually mean?

[ksuprynowicz]

Maybe this should stay at as debug if it happens every time?