Hello, will be good if VM modul supports:
I use VETH networking and other features like VPN, so DEVNODES="net/tun:rw " or PPTP vpn, so FEATURES="ppp
Many things can be done by custom template stored in conf-custom instead of /usr/local/ispconfig/interface/web/vm/templates/openvz.conf.tpl and
Add one textarea field, where we can write what we need, for example Devices, devnodes, iptables, netif etc...
I think it is simple to make this.
will be good, if can do this in v3.0.5
Probably you can change Capabilities field from input to textarea
and rename it.