Introduced in the bonding driver (commit ae46f184bc1f) now reports transmission failures.
Before that, it silently dropped the packet and replied with success error code.

The arping of iputils retries endlessly when a transmission error occurs.

This patch fix this behavior.

This patch fixes issue, when interface wasn't
bring up.

Some interfaces like Open vSwitch bridges using the userspace datapath,
needs the link to be kept down to avoid issues.
Add a LINKSTATUS=[down|up] ifcfg parameter to add this functionality.
If not specified, the link will default to up as before.

Patch provided by Matteo Croce <mcroce@redhat.com>

Use internal network-scripts function net_log() instead of
/usr/bin/logger if possible to make code more consistent and cleaner.

Fix the problem when the device name could be interpreted as an iproute2 keyword.
For example, for a bridge slave named "a" the iproute2 would treat the name
as a prefix of keyword "address" and the network-scripts would fail to set
the bridge master.

Related: rhbz #1859785

set umask in case resolv.conf doesn't exist