Calls to URL.equals and URL.hashCode should be removed

Marshall wrote:
Findbugs has just been updated to find additional issues- the current
version is 1.1.3.

One of the new things it finds is uses of java.net.URL.equals(...) and
hashCode(). It turns out
these methods make blocking calls to DNS services on the internet.

See:
http://michaelscharf.blogspot.com/2006/11/javaneturlequals-and-hashcode-make.html