Changes for robustness and VxWorks NFSv2 Client

These changes allow to use the NFSv2 Client included in VxWorks. 

I also had troubles when my VxWorks system rebooted. The NFS server messed things up a little bit. It showed signs of unreliability (like other, commercial NFS servers also did), in that it overwrote files on my disk that it wasn't supposed to alter. After rebooting, sometimes, the server started writing the log of my software all over the configuration files! Hope that these changes will fix the problem once and for all. (I had this same problem with HaneWin NFS Server)