print_unknown_host_msg
static void print_unknown_host_msg(const char *, const char *);
print_unknown_host_msg("", targethost);
print_unknown_host_msg("", nexthop);
print_unknown_host_msg(" IPv6",
print_unknown_host_msg(" IPv4",
static void print_unknown_host_msg(const char *, const char *);
print_unknown_host_msg("", hostname);
print_unknown_host_msg(" IPv6",
print_unknown_host_msg(" IPv4",