[MacPorts] #34680: port atlas - remove ui_warn command from top level, add maintainer

[MacPorts]

#34680: port atlas - remove ui_warn command from top level, add maintainer
-------------------------------------+--------------------------------------
 Reporter:  and.damore@…             |       Owner:  jameskyle@…           
     Type:  defect                   |      Status:  new                   
 Priority:  Normal                   |   Milestone:                        
Component:  ports                    |     Version:  2.1.1                 
 Keywords:                           |        Port:  atlas                 
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 atlas has an ''ui_warn''
 [http://trac.macports.org/browser/trunk/dports/math/atlas/Portfile#L245 at
 portfile root level], this leads to the warning being printed whenever the
 portfile is read and parsed, like dependency checking for atlas'
 dependents or even a simple ''port lint atlas''.

 Please move into a more appropriate block, ''post-configure'' seems a good
 candidate.

 At the same time I suggest ''vince'' is marked as maintainer since most
 commits in last 18 months are his.

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Ticket URL: <https://trac.macports.org/ticket/34680>
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