Cache problem + fix

Problem:

If the libwww cache contains an entry for a document and you PUT the
document corresponding to this entry, the entry isn't updated. If you
quit the libwww application and you browse the document, you'll get the 
previous version.

Fix:

In HTCache.c, I systematically delete the cache entry whenever doing
a PUT:

1369,1372c1369,1376
<               if (status == 204)
<                   HTCache_updateMeta(cache, request, response);
<               else
<                   HTCache_remove(cache);
---
>             HTMethod method = HTRequest_method(request);            
>             if (status == 204 && method != METHOD_PUT) {
>               /* to avoid cache corruption, we remove all entries
>                  we PUT */
>               HTCache_updateMeta(cache, request, response);
>             }
>             else
>               HTCache_remove(cache);


Anyone sees any objections on my integrating this fix to the libwww
base?

Thanks,

-Jose