[MacPorts] #38834: samba4: Update to 4.6.0

[MacPorts]

#38834: samba4: Update to 4.6.0
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  Reporter:  macsforever2000@…  |      Owner:
      Type:  update             |     Status:  assigned
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:
Resolution:                     |   Keywords:
      Port:  samba4             |
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Description changed by mf2k:

Old description:

> The samba4 port should be updated to the latest stable version. Currently
> that is 4.0.5.
>
> Also the livecheck is broken.

New description:

 The samba4 port should be updated to the latest stable version.

 Also the livecheck is broken.

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Ticket URL: <https://trac.macports.org/ticket/38834#comment:32>
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