[MacPorts] #23461: nginx: Add debug mode variant

[MacPorts]

#23461: nginx: Add debug mode variant
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 Reporter:  y8@…         |       Owner:  boeyms@…           
     Type:  enhancement  |      Status:  new                
 Priority:  Normal       |   Milestone:                     
Component:  ports        |     Version:                     
 Keywords:  haspatch     |        Port:  nginx              
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Comment(by vjt@…):

 Bump. Please apply: the `--with-debug` option enables the
 `debug_connection`, `debug_points` directives and the `debug` option to
 the `error_log` directive, that are very useful when troubleshooting.

 Thank you :)

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Ticket URL: <https://trac.macports.org/ticket/23461#comment:4>
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