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That commit doesn't fix anything but it is a better way to have
LinphoneFriendList objects created with a refcount to 1 systematically.

make sure normalized phone numbers are computed for each new subscription to take into account potentiel proxy config changes.

If multicast is used, create RTP socket with the same address familly as the multicast address, in order to workaround issues with dual stack sockets and multicast, especially on mac os.

This reverts commit a2318062.

[accountCreator] update account_creator_configure to keep default value server_add and route if not null