Some interfaces may have IPv6 addresses even if an IPv6 address is not

"configured on the local system". Whatever that means. Example that is biting
me is loopback has ::1 as an address, but the network interface is v4 only.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

crypto/bio/b_addr.c

@@ -666,9 +666,6 @@ int BIO_lookup(const char *host, const char *service,
         struct addrinfo hints;
         memset(&hints, 0, sizeof hints);
 
-# ifdef AI_ADDRCONFIG
-        hints.ai_flags = AI_ADDRCONFIG;
-# endif
         hints.ai_family = family;
         hints.ai_socktype = socktype;