lgetipnodebyname
hp = lgetipnodebyname(hostname, AF_INET, 0, &error_num);
hp = lgetipnodebyname(hostname, AF_INET6, 0, &error_num);
hp = lgetipnodebyname(hostname, AF_INET, 0, &error_num);
hp = lgetipnodebyname(hostname, AF_INET6, 0,
hp = lgetipnodebyname(hostname, AF_INET6,
extern struct hostent *lgetipnodebyname(const char *, int, int, int *);