Don't create IPv6 sockets if IPv6 is completely disabled (see #3159) #3179
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As explained in #3159, the change we made there to switch to
getaddrinfo
caused the involved plugins to break on machines where IPv6 is entirely disabled (and not just not present). See this post on Discourse for context. This PR applies the same fix we added in #2916 for forwarders to the sockets we changed in SIP/NoSIP/AudioBridge.Please test and provide feedback, as I have no way to test this myself (I don't have IPv6 on my machine but it's not disabled).