[MacPorts] #59381: port clean: do something better when no ports are specified

[MacPorts]

#59381: port clean: do something better when no ports are specified
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  Reporter:  6aKa         |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:
Resolution:               |   Keywords:
      Port:               |
--------------------------+--------------------

Comment (by 6aKa):

 the same situation with `port install`, `port uninstall`, `port info` and
 other actions.

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Ticket URL: <https://trac.macports.org/ticket/59381#comment:4>
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