gentoo-add_ip.sh: fix the case then config_venet0 is commented out

I had some config entries commented out in /etc/conf.d/net which
caused the add ip script (/etc/vz/dists/scripts/gentoo-add_ip.sh) to
fail. I fixed this by adding a "^" to the beginning of the grep -qw
command, as below....

There are still other potential problems with parsing the scripts in
the way you do, but this at least will deal with the situation where
someone has commented-out config_venet0 lines in their
/etc/conf.d/net.
1 file changed