[MacPorts] #31247: root: update to v5.30.01

[MacPorts]

#31247: root: update to v5.30.01
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 Reporter:  jonesc@…                  |       Owner:  ryandesign@…           
     Type:  defect                    |      Status:  assigned               
 Priority:  Normal                    |   Milestone:                         
Component:  ports                     |     Version:  2.0.3                  
 Keywords:  haspatch maintainer       |        Port:  root                   
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Comment(by macsforever2000@…):

 Generally the answer is no, that is not acceptable. Macports should not
 rely on the user's environment. ROOT needs to look for a specific python
 executable and the portfile can change that based on the desired python
 with a variant - or better yet - root-pythonxx subport.

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Ticket URL: <https://trac.macports.org/ticket/31247#comment:5>
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