SUSE-SU-2019:2727-2 Security update for dhcp

This update for dhcp fixes the following issues: Secuirty issue fixed: - CVE-2019-6470: Fixed DHCPv6 server crashes bsc1134078. Bug fixes: - Add compile option --enable-secs-byteorder to avoid duplicate lease warnings bsc1089524. - Use IPv6 when called as dhclient6, dhcpd6, and dhcrelay6 bsc11365...