vz-postinstall: be verbose about what we do

Add output of what we're changing. Add grep to skip changing if the
value is already the way we want it to be.

First run:
vz-postinstall: /etc/sysconfig/selinux: set SELINUX = disabled
vz-postinstall: /etc/sysctl.conf: set net.ipv4.ip_forward = 1
vz-postinstall: /etc/sysctl.conf: add net.ipv4.conf.default.proxy_arp = 0
vz-postinstall: /etc/sysctl.conf: set kernel.sysrq = 1
vz-postinstall: /etc/sysctl.conf: add net.ipv4.conf.default.send_redirects = 1
vz-postinstall: /etc/sysctl.conf: add net.ipv4.conf.all.send_redirects = 0
vz-postinstall: /etc/sysctl.conf: set net.bridge.bridge-nf-call-ip6tables = 1
vz-postinstall: /etc/sysctl.conf: add net.bridge.bridge-nf-call-iptables = 1

Second run:
(no output)

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed