Porting to OS/2: Case # 10 getnameinfo(), freenameinfo() and getaddrinfo()

getnameinfo(), freenameinfo() and getaddrinfo() are not provided by kLIBC. Like poll(), you can find the replacements from many projects such as FFmpeg and Gnulib. Here is the one based on VLC.

getaddrinfo.h : https://github.com/komh/os2compat/blob/master/network/getaddrinfo.h
getaddrinfo.c : https://github.com/komh/os2compat/blob/master/network/getaddrinfo.c