fixing a compiler warning in the append_scopeid() function.

ifdefs where . was used instead of _!

in mingw builds

macros accordingly.

Avoid warning 'x might be used uninitialized in this function'.

Use DNS__32BIT() and DNS__16BIT()  (How about BE machines?).
Display T_AAAA resource.

since IPv6 support is required.

Added -D'efines'.

<ws2tcpip.h> since IPv6 is no longer optional (was it ever?)

Replace <winsock.h> with <winsock2.h> + <ws2tcpip.h>
(ala libcurl since IPv6 is not optional now).

to do (what I believe is) "right". See docs on:
http://publib.boulder.ibm.com/infocenter/pseries/index.jsp?topic=/com.ibm.aix.doc/libs/commtrf2/getservbyport_r.htm

2 - indented and edited to fit better within 80 columns
3 - fixed possible buffer overflow in the service name lookup function

way of detecting it

Added constants that will be used by ares_getaddrinfo. Made ares_getnameinfo use the reentrant getservbyport (getservbyport_r) if it isavailable to ensure it works properly in a threaded environment