License problem with files in dlls/icmp/

[Ilja Kamps]

It appaers that files under dlls/icmp/ are licensed under the BSD license and not
the X11 license, this might be a problem as wine does not honor the advertisment
part and also it makes wine GPL incompaitible, I would consider this a serious
problem. Either we honor the advertisment part and note that wine is not directly
GPL compaitible (GPL doesn't allow such texts) or we reimplement that dll.

I hope I got it right.