[UDP]: Do not allow specific bind when wildcard bind exists. When allocating local ports, do not allow a bind to a port with a specific local address when a bind to that port with a wildcard local address already exists. Noticed by Linus.
metadata: de34ed91c4ffa4727964a832c46e624dd1495cf5 [linux < 2.6.22][gp < 2.6.22-1]