DirectoryServerResource variant detection does not support files with multiple . in their name

[lsimons]

When using the TunnelService for its extension filter, there's a problem on this line:

restlet-framework-java/modules/org.restlet/src/org/restlet/engine/local/DirectoryServerResource.java

Line 736 in a1a1e17

firstDotIndex = fullEntryName.indexOf('.');

With a filename like jquery-1.8.0.min.js, it ends up considering ".8.0.min.js" the variant, and "jquery-1" the base name, so discards that directory entry, resulting in the end in a 404.

The obvious fix for this one example is to use lastIndexOf("."), but I'm not sure that's really what's intended -- for example I don't know how cases such as foo.index.en.html should be taken care of.