Request for Review 6922151

[Christopher Hegarty -Sun Microsystems Ireland]

Hi Alan, Michael,

While investigating another issue I noticed that there is quite a bit of 
redundant static caching of methodIDs, fieldIDs, and global references 
to class objects. Most of these are for InetAddress, Inet4Address, 
Inet6Address and NetworkInterface.

These classes already provide native init methods that cache a reference 
to their class objects and common ID's. We should simply ensure that 
this init (net_util.c) method is called and then use them. Also, all 
these ID's are externally defined in net_util.h so we can use them directly.

Note:
  I also cleaned up a few compiler warning in the windows code.

6922151: Cleanup static caching of method/fieldIDs and unnecessary
          global references

Webrev:
   http://cr.openjdk.java.net/~chegar/6922151/webrev.0/webrev/

Thanks,
-Chris.