tcp ddos: add tcpddosctrl for safe execution

add tcpddosctrl to start/stop/status XDP
TCP DDoS program from tcp-ddos.cgi safely.

permission of tcpddosctrl

chown root.nobody /usr/local/bin/tcpddosctrl
chmod u+s /usr/local/bin/tcpddosctrl

result:
-rwsr-x--- 1 root nobody 14672 Mar 19 09:58 /usr/local/bin/ddosctrl

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>

config/rootfiles/common/misc-progs

@@ -29,6 +29,7 @@ usr/local/bin/suricatactrl
 usr/local/bin/sshctrl
 usr/local/bin/syslogdctrl
 usr/local/bin/timectrl
+usr/local/bin/tcpddosctrl
 #usr/local/bin/torctrl
 usr/local/bin/unboundctrl
 usr/local/bin/updxlratorctrl