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

inventing and providing our own. Hopefully this solves a HP-UX 11.00 problem.

when getting the DNS server etc.