Remove buf argument from link_socket_set_outgoing_addr

Remove buf argument from link_socket_set_outgoing_addr

This was only used in a check that is better suited in the calling
functions. This also removes passing the buf argument to
link_socket_connection_initiated that also does not use that
parameter at all.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20200810143707.5834-6-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg20677.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>