[MacPorts] #39715: raxml @7.2.9: update to 7.6.6

[MacPorts]

#39715: raxml @7.2.9: update to 7.6.6
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  Reporter:  mattoates@…  |      Owner:  macports-tickets@…
      Type:  update       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch maintainer
      Port:  raxml        |
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Comment (by mattoates@…):

 Replying to [comment:2 egall@…]:
 > - You don't have to cc yourself, ticket reporters are automatically
 notified anyway
 Yeah discovered this as soon as I'd done it, thanks.

 > - See if you can get upstream to supply an actual tag to download from,
 instead of just a hash
 https://github.com/stamatak/standard-RAxML/issues/9 I raised an issue for
 this, but its an outstanding request for over 6 months and the version of
 raxml currently available on MacPorts is really out of date.

 > - Try to use at least 2 checksums. Since you're already using sha256,
 the next strongest one after that (that MacPorts supports) is rmd160.
 I've just replaced the Portfile including a the rmd160 sum

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Ticket URL: <https://trac.macports.org/ticket/39715#comment:4>
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