utils: Always specify family for address in get_addr_1()

utils: Always specify family for address in get_addr_1()

Set ->family correctly when string representing address
is "default", "all" or "any": get_addr_1() might be called
with AF_UNSPEC (e.g. get_addr() -> get_addr_1()).

Extend support for zero address to all address families,
not only AF_INET and AF_INET6 when one explicitly given
as @family: use af_byte_len() to correctly set address length.

Still assume AF_INET when @family is AF_UNSPEC.

Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>