We should specify appletviewer behaviour about encoded/unencoded URL.

This behaviour is described in:
http://java.sun.com/j2se/1.5.0/docs/tooldocs/solaris/appletviewer.html
http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/appletviewer.html

Something like this should be added:
"*appletviewer* accepts encoded URLs according to the escaping mechanism defined in RFC2396. Only encoded URLs are officially supported.*appletviewer* accepts ordinary file names which must be provided unencoded according to RFC2396."