hdf5

[svn-r2679] 
Purpose:
    Just add a few lines so that it will not break windows platform.
Description:
     netdb.h cannot be recognized by windows, use winsock.h in windows instead.
Solution:
        adding  the following lines at the beginning of H5FDstream.c.
         If you don't like, you may do it in another way, just keep it work for windows.
       #ifdef WIN32
> #include <winsock.h>
> #else
> #endif

Platforms tested:
    I am only testing whether it will bother building objects on windows. I haven't tested whether it
will affect the testing results. Hopefully not.
    windows 2000, eirene,arabica,gondolin,paz,opus.