Ohops, unit tests were bit broken. Fix.
Merge branch 'ms-dns' of github.com:fingon/hnet-core into ms-dns

Conflicts:
	spec/hp_ospf_spec.lua
Added consistent(?) rid- and iid prefix handling. Now they're constants that we use both in test code and real code, and also we should do correct rid/iid => label-version of rid/iid conversions.