[MacPorts] #62861: ttcp: Fix compilation on Big Sur

[MacPorts]

#62861: ttcp: Fix compilation on Big Sur
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 Reporter:  DanielO          |      Owner:  (none)
     Type:  enhancement      |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:
 Keywords:  bigsur haspatch  |       Port:  tcp
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 Add a few includes so it compiles without error.

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Ticket URL: <https://trac.macports.org/ticket/62861>
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