Code Review 7022269: clean up fscanf usage in soalris networking native code

[Chris Hegarty]

Michael, Alan,

Some small cleanups to the use of scanf with specified string width. The 
buffers should be sized large enough to handle the specified width and 
the null terminator.

http://cr.openjdk.java.net/~chegar/7022269/webrev.00/webrev/

-Chris.