[MacPorts] #47180: fix net/openconnect - replace unmaintained dependency

[MacPorts]

#47180: fix net/openconnect - replace unmaintained dependency
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 Reporter:  bjorn.ketelaars@…  |      Owner:  macports-tickets@…
     Type:  enhancement        |     Status:  new
 Priority:  Normal             |  Milestone:
Component:  ports              |    Version:  2.3.3
 Keywords:                     |       Port:
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 Openconnect relies on a script to provide an OS-independent interface for
 various operations associated with configuring VPNs over tun devices. This
 script is currently provided by net/vpnc. Upstream vpnc seems not active.
 Most recent release is from 2008. The main author of the script(s) is
 actively maintaining the script(s) in a different git-repo. Most recent
 commit fixes split DNS / split routing issue.

 Enclosed diff replaces net/vpnc with net/vpnc-scripts. The latter is a new
 submission: Ticket #47158.

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Ticket URL: <https://trac.macports.org/ticket/47180>
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