[MacPorts] #55984: Upgrade sleuthkit to 4.6

[MacPorts]

#55984: Upgrade sleuthkit to 4.6
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 Reporter:  dershow      |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  sleuthkit
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 The Sleuthkit port has not been updated for a little while, and is about
 due for an upgrade to 4.6 that was just released
 [http://sleuthkit.org/sleuthkit/download.php]

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Ticket URL: <https://trac.macports.org/ticket/55984>
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