Command line option to set tun device name

[Shulyaka]

The reason behind this functionality is to allow a user to chose a certain device name to be able to assign a correct firewall zone. This way the user first configures a network interface and firewall, and then runs ocat with this new parameter to match the network interface configuration.

Signed-off-by: Denis Shulyaka shulyaka@gmail.com

[rahra]

Please replace strncpy() with strlcpy() otherwise tunname will be unterminated if you pass an argument with a string length of more than sizeof(tunname).

[Shulyaka]

You are right. Done.