This update for dhcp fixes the following issues:
Secuirty issue fixed:
- CVE-2019-6470: Fixed DHCPv6 server crashes (bsc#1134078).
Bug fixes:
- Add compile option --enable-secs-byteorder to avoid duplicate lease warnings (bsc#1089524).
- Use IPv6 when called as dhclient6, dhcpd6, and dhcrelay6 (bsc#1136572).