Port=0, binding in Random...

[Pier Fumagalli]

Anytime we construct a ServerSocket in Tomcat, we shouldn't allow the value
"0" to be passed to the ServerSocket constructor, as that will bind down to
a random port number... (and we don't want to open random ports on the
server, don't we?)

For TC40, I believe the fix is pretty easy, in ServerSocketFactory... I
don't know if TC3x is affected...

Thanks to Tal for noticing...

    Pier