Moodle networking (MNet)

Sounds great to me. One configuration that might be very welcome is to make (b) switchable like:

"Interoperate with old mnet sites at the expense of security? [yes/no/icecream]"

So the decision for the Moodle release managers / maintainers becomes one of "should we change the default?". And if the patch is workable for 1.8/1.9, we can merge it into 18_STABLE and 19_STABLE or at least offer it for admins that care.