[tor-bugs] #9975 [Flashproxy]: use argparse rather than getopt

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#9975: use argparse rather than getopt
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     Reporter:  infinity0    |      Owner:  infinity0
         Type:  enhancement  |     Status:  needs_review
     Priority:  minor        |  Milestone:
    Component:  Flashproxy   |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by infinity0):

 I've re-done these series of commits here, now grouped by intent/topic
 rather than by file

 https://github.com/infinity0/flashproxy/compare/master...bug9975

 - The first 5445680 is a minor deduplication that was better placed at the
 start.
 - The next two 95c4a88 c665081 do the actual migration to argparse.
 - The next few 913fa0c 116582c 817a00e 8b1c987 do refactorings within
 files, mostly making global variables more local in scope.
 - The final 31913a4 does a deduplication over all the files, mostly
 deleting common code.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9975#comment:12>
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