[MacPorts] #38453: Hydra 5.4_3 updated to 7.4.2

[MacPorts]

#38453: Hydra 5.4_3 updated to 7.4.2
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  Reporter:  zan@…   |      Owner:  macports-tickets@…
      Type:  update  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.1.3
Resolution:          |   Keywords:  haspatch
      Port:  hydra   |
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Comment (by ryandesign@…):

 The psqlXX variants should be renamed to match the port names
 (postgresqlXX).

 In addition to the mysql51 and mysql55 variants, there should be mysql5,
 mariadb and percona variants; all 5 should conflict with one another.

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Ticket URL: <https://trac.macports.org/ticket/38453#comment:5>
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