[Patch] Proxy command-line argument

[Dave Korn]

  Well, after some very minor refactoring and reformatting, here's what I will
commit (in twelve hours or so, unless anyone raises any issue between now and
then).  It builds cleanly and I tested that it works by installing a couple of
packages through Tor[*] and found no problems.

  Thanks again to Vincent for the patch and Warren for C++ advice :)

    cheers,
      DaveK


[*] - ..... OR DID I ?????!!!1!!!  MUAHAHHAHAAA!!!
-- 
Can't think of a witty .sigline today....
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