[MacPorts] #28353: Bump eggdrop to 1.6.20

[MacPorts]

#28353: Bump eggdrop to 1.6.20
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 Reporter:  dre@…        |       Owner:  ryandesign@…           
     Type:  update       |      Status:  assigned               
 Priority:  Normal       |   Milestone:                         
Component:  ports        |     Version:  1.9.2                  
 Keywords:               |        Port:  eggdrop                
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Comment(by ryandesign@…):

 Please submit a portfile diff, not a full portfile. Your full portfile
 that you submitted is based on an outdated portfile. Please consult the
 repository and obtain the latest current eggdrop portfile, then make your
 changes based on that, then submit a diff of it.

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Ticket URL: <https://trac.macports.org/ticket/28353#comment:2>
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