update to net-mgmt/arts++

[Doug Barton]

Young Hyun wrote:
> We've released a new version of net-mgmt/arts++.  Would it be possible
> for the ports file to be updated (there is currently no maintainer set
> for it)?

Ok, all set. In addition to the version upgrade, I tuned up the port a bit,
let me know if you see any problems with it.

Always glad to help CAIDA,

Doug

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