Fixed typos and binding description

 * Multicast could be sent only from one interface hence corrected
 help description for driver/adapter and intercepted specially
 handled word 'all' in Bind.
 * Fixed typo in SendTo - fRecvAddr/fSendAddr.
 * Since connect(UNSPEC) does not reset remote peer name for socket
 (at least on linux) Sockfd is always recreated after connect()
 probe.