Porting 3 source patches for CentOS
dhclient-ipv6-bind-to-interface.patch
dhclient-ipv6-conditionally-set-hostname.patch
dhclient-restrict-interfaces-to-command-line.patch
Ignore 0001-dhcp-set-the-prefixlen-to-64.patch, which disables
a patch from dhcp-4.2.5-82.el7.centos.src.rpm.
Porting dhclient-dhcp6-set-hostname.patch based on the
dhclient-script.linux of Debian package.
Story: 2009221
Task: 43440
Signed-off-by: Yue Tao <yue.tao@windriver.com>
Change-Id: I457230bc08a23abb1efa1a7619c0cba8ff4d7967
ddf1b6eca6