More InetAddress fixes.

1. Make sure getHostByAddrImpl actually throws UnknownHostException: set
   NI_NAMEREQD when calling getnameinfo to ensure it will fail if the IP
   address looked up does not have a name associated with it, and pass this
   exception back to the Java code. That way, the UnknownHostException passed
   back to the Java code has information on what went wrong.
2. Remove superfluous logging on reverse lookups in the C code.

Change-Id: Ie195ce1f12e7b43fbf75f494002804f9db68fd8c
1 file changed