Move setting global enabled flag from /etc/init.d/mwan3 to mwan3
command. So we could start mwan3 from the cmd mwan3 as well.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

Adding a init script to "/etc/init.d/" introduce the possibility to
enable/disable mwan3 globally.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

Fixed issue where an manual ifup-ed interface would immediatly go down again
Remove from init as mwan3 is not a service

Signed-off-by: Jeroen Louwes <jeroen.louwes@gmail.com>

Add iptables -w option, which increases stability, requires iptables v1.4.20.
Code cleanup

Signed-off-by: Jeroen Louwes <jeroen.louwes@gmail.com>

Signed-off-by: Jeroen Louwes <jeroen.louwes@gmail.com>