* src/sockaddr.c (print_inet_addr): Use tprints_arg_begin,
tprint_arg_next, and tprint_arg_end.
(print_sockaddr_data_in6): Use tprint_comment_begin, tprints_arg_begin,
PRINT_VAL_U, tprint_arg_end, and tprint_comment_end.
(print_sockaddr_data_ax25): Use tprint_array_begin, tprint_array_next,
tprint_unavailable, and tprint_array_end.
(print_sockaddr_data_ipx): Use tprints_arg_begin, PRINT_VAL_X,
and tprint_arg_end.
(print_sll_protocol): Use tprints_arg_begin and tprint_arg_end.
(print_sockaddr_data_ll): Use tprint_array_begin, tprint_array_next,
and tprint_array_end.
(print_bluetooth_l2_psm, print_bluetooth_l2_cid): Use tprints_arg_begin,
PRINT_VAL_X, PRINT_VAL_U, and tprint_array_end.
(print_sockaddr_data_bt): Use tprints_arg_begin, PRINT_VAL_U,
and tprint_array_end.
(print_sockaddr): Use tprint_struct_next.
* tests/net-sockaddr.c (check_ax25): Update expected output.