leave nictoolserver.conf alone during simple upgrades

Doing this would allow simple upgrades like 

```
cd /usr/local/nictool
wget http://www.nictool.com/download/NicTool.tar.gz
tar zxvf NicTool.tar.gz
mv server/NicToolServer-2.24.tar.gz ../
tar zxvf NicToolServer-2.24.tar.gz
```
to not overwrite the config file.

On a seperate note, why does the main nictool tarball extract into client and server directories?  As you can see from above it makes for more work.  if they just dropped into the current working directory that would be ideal.  Also the client and server tarballs should extract to client and server and not a directory with the full version.  Just my thoughts.