getaddrinfo() test for https://github.com/curl/curl/pull/2073

getaddrinfotest.c

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
  struct addrinfo hints, *infoptr, *p;
  char host[256];
  int result;

  memset(&hints, '\0', sizeof(hints));
  hints.ai_family = AF_INET;
  hints.ai_socktype = SOCK_STREAM;

  result = getaddrinfo("127.0.0.1 www.example.com", "443", &hints, &infoptr);
  if (result) {
    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(result));
    exit(1);
  }

  for(p = infoptr; p != NULL; p = p->ai_next) {
    getnameinfo(p->ai_addr, p->ai_addrlen, host, sizeof(host), NULL, 0, NI_NUMERICHOST);
    puts(host);
  }

  freeaddrinfo(infoptr);
  return 0;
}