Valid characters in a module name

[Ess Kay]

> chances of meeting a module-info.class with funky module names is low
When I raised the initial question, I had no idea that the Java verifier
had been changed (with Java 6?) to allow "funky" package, class, field and
method names. Somehow that change passed right under the radar. Yes - a
possible option would be to simply ignore the broad character range allowed
by the JVM specification and trust that in practice no one would actually
use the usual characters in package, class, field, method or module names.
A downside to that option is that we will no longer be able to say to our
users that we fully support the JVM specification which in some cases can
be a problem. Anyway, I guess it is time to accept the overwhelming inertia
of the status quo and move on to the next problem.