[MacPorts] #44013: logwatch: update to 7.4.0 and fix livecheck

[MacPorts]

#44013: logwatch: update to 7.4.0 and fix livecheck
--------------------------+---------------------------
 Reporter:  ryandesign@…  |      Owner:  lassi.tuura@…
     Type:  update        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  logwatch
--------------------------+---------------------------
 logwatch 7.4.0 is out since 2011. The port should be updated to this
 verison.

 The port's livecheck is faulty and should be fixed to detect this and
 future versions:

 {{{
 $ port livecheck logwatch
 logwatch seems to have been updated (port version: 7.3.6, new version:
 7.3)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/44013>
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