[Pidgin] #15418: network: Add dual stack socket API / fix AF_UNSPEC usage

[Pidgin]

#15418: network: Add dual stack socket API / fix AF_UNSPEC usage
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 Reporter:  tux     |      Owner:
     Type:  patch   |     Status:  new
Milestone:          |  Component:  libpurple
  Version:  2.10.6  |   Keywords:  ipv6 dualstack api network af_unspec
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 Here are three patches fixing some issues with the current AF_UNSPEC usage
 with purple_network_listen(_range)().

 Also see #14755.

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Ticket URL: <https://developer.pidgin.im/ticket/15418>
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