A bunch of changes attempting to deal with testbed networks that are
bigger then a /24 network, as in Utah's network. Mostly the changes are how we deal with the reverse zone file creation and what gets stuck into the named.conf file. Prior to this commit, we assumed a single /24 network, cause thats how it looks in an elabinelab experiment (which is where its critical to have the named config files generated automatically). But with the changes to support a single control network, the named setup inside elabinelab is bigger then a /24 and the reverse files have to be created and populated correctly.
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