Enhancement for show security flow statistics operational command

The output for the show security flow statistics command has been modified. The Packets forwarded field has been split into to Packets received and Packets transmitted. The Packets received field displays the actual number of packets received, including those dropped by the system. The Packet transmitted field displays the number of packets returned to Jexec for transmission. The Packets forwarded/queued displays the actual number of packets forwarded excluding the dropped packets. Additionally, the new field Packets copied has been created to provide information about packets copied by other modules including fragmentation and TCP proxy.