[MacPorts] #33456: port weechat: avoid plugin loading error - add docs

[MacPorts]

#33456: port weechat: avoid plugin loading error - add docs
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 Reporter:  and.damore@…             |       Owner:  nefar@…            
     Type:  defect                   |      Status:  new                
 Priority:  Normal                   |   Milestone:                     
Component:  ports                    |     Version:  2.0.4              
 Keywords:  haspatch                 |        Port:  weechat            
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 I'm attaching patch to fix weechat error for duplicate plugin loading at
 start.

 The patch also copies docs in proper directory.

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Ticket URL: <https://trac.macports.org/ticket/33456>
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