[MacPorts] #62437: hyperic-sigar: update to 1.6.4

[MacPorts]

#62437: hyperic-sigar: update to 1.6.4
--------------------------+---------------------------
 Reporter:  chrstphrchvz  |      Owner:  nefar@…
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  hyperic-sigar
--------------------------+---------------------------
 The `hyperic-sigar` port is still at version 1.6.2 as when submitted in
 2009; latest published release is 1.6.4 (from 2010); there was further
 upstream development at [https://github.com/hyperic/sigar] until 2016.

 There are currently 4 reported installations of this port; no issues nor
 update requests were ever reported (although many reported upstream). Is
 the port still useful and should be kept and updated, or should it be
 removed?

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Ticket URL: <https://trac.macports.org/ticket/62437>
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