removed usage of 's6_addr', fixing compilation issue triggered with no

ares_gethostbyaddr.c

@@ -272,7 +272,7 @@ static void ptr_rr_name(char *name, const struct ares_addr *addr)
     }
   else
     {
-       unsigned char *bytes = (unsigned char *)&addr->addrV6.s6_addr;
+       unsigned char *bytes = (unsigned char *)&addr->addrV6;
        /* There are too many arguments to do this in one line using
         * minimally C89-compliant compilers */
        sprintf(name,

ares_gethostbyname.c

@@ -504,7 +504,9 @@ static int get6_address_index(const struct ares_in6_addr *addr,
     {
       if (sortlist[i].family != AF_INET6)
         continue;
-        if (!ares_bitncmp(&addr->s6_addr, &sortlist[i].addrV6.s6_addr, sortlist[i].mask.bits))
+        if (!ares_bitncmp(addr,
+                          &sortlist[i].addrV6,
+                          sortlist[i].mask.bits))
           break;
     }
   return i;

ares_ipv6.h

@@ -22,10 +22,6 @@
 #define PF_INET6 AF_INET6
 #endif
 
-#if !defined(HAVE_STRUCT_IN6_ADDR) && !defined(s6_addr)
-#define s6_addr _S6_un._S6_u8
-#endif
-
 #ifndef HAVE_STRUCT_SOCKADDR_IN6
 struct sockaddr_in6
 {