ss: always prefer family as part of host condition to default family

ss: always prefer family as part of host condition to default family

ss accepts an address family both with the -f option and as part of a
host condition. However, if the family in the host condition is
different than the the last -f option, then which family is actually
used depends on the order that different families are checked.

This changes parse_hostcond to check all family prefixes before parsing
the rest of the address, so that the host condition's family always has
a higher priority than the "preferred" family.

Signed-off-by: Thayne McCombs <astrothayne@gmail.com>
Signed-off-by: David Ahern <dsahern@kernel.org>