[MacPorts] #45092: Adding jemalloc portfile

[MacPorts]

#45092: Adding jemalloc portfile
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  Reporter:  cornelius.howl@…  |      Owner:  macports-tickets@…
      Type:  submission        |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.3.1
Resolution:                    |   Keywords:
      Port:                    |
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Comment (by ryandesign@…):

 Thanks. Some observations:

  * "openmaintainer" is not a valid maintainer, by itself. If you don't
 want to maintain the port, the correct value is "nomaintainer"
  * Why rename files in post-extract?
  * The unused commented-out code should be removed

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Ticket URL: <https://trac.macports.org/ticket/45092#comment:1>
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