Bugfix for ISSUE #22

I've been looking into ISSUE #22.
I'm not use when ever it will happen that binding to 255.255.255.255 will cause the socket to listen on eth0 only (as i don't have wireless access to my switch yet) but as setting socket.bind() to INADDR_ANY fixes the problem that should be fine. Explicitly binding to an interface via SO_BINDTODEVICE is an privileged option so going with a bind to ANY is the preferred solution. Sending packages is bind to the correct interface so listening to ANY isn't causing any harm.