RFC5952 issue

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David Waitzman

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Apr 22, 2013, 11:27:27 AM4/22/13

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dns python 1.10 does not seem to conform to RFC5952 section 4.2.2:

   The symbol "::" MUST NOT be used to shorten just one 16-bit 0 field.
   For example, the representation 2001:db8:0:1:1:1:1:1 is correct, but
   2001:db8::1:1:1:1:1 is not correct.

I think the bug fix is to change line 75 of ipv6.py from
    if best_len > 0:
to
    if best_len > 1:

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