FUNCTIONS
sw_address_any
sw_address_loopback
sw_address_init
sw_address_init_from_saddr
sw_address_init_from_name
sw_address_init_from_address
sw_address_init_from_this_host
sw_address_fina
sw_address_is_any
sw_address_saddr
sw_address_name
sw_address_decompose
sw_address_equals