BIND 10 #1534: socket creator should set IPV6_USE_MIN_MTU for AF_INET6 UDP sockets

[BIND 10 Development]

#1534: socket creator should set IPV6_USE_MIN_MTU for AF_INET6 UDP sockets
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  reviewing
                       Type:         |             Milestone:
  defect                             |  Sprint-20120306
                   Priority:  major  |            Resolution:
                  Component:  Boss   |             Sensitive:  0
  of BIND                            |           Sub-Project:  Core
                   Keywords:         |  Estimated Difficulty:  2
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Changes (by vorner):

 * owner:  vorner => UnAssigned
 * status:  accepted => reviewing


Comment:

 Hello

 It should be ready for review. As discussed on the mailing list, the test
 for MTU is disabled, as it returns something else than is being set. Also,
 Shane noted on jabber that the socket leaked whenever there was an error
 other than the `socket()` call failing, so I fixed that.

 The changelog could be like this:
 {{{
 [bug]           vorner
 The UDP IPv6 packets are now correctly fragmented for maximum guaranteed
 MTU,
 so they won't get lost because being too large for some hop.
 }}}

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Ticket URL: <http://bind10.isc.org/ticket/1534#comment:6>
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