transport calls to LibTCPConnect that suffer certain early failures
like parameter errors or early route lookup failures return without
initializing the pcb.
In order to avoid later BSOD's this change clears the
ConnectionRequest bucket in those cases.
* Allow 0xFFFF as valid port number
* Note possible reason for failure in TCPAllocatePort
* Return NtStatus error on TCP/IP out-of-ports failure
* Replace unavailable "ERR" with "DbgPrint"
