Merge pull request #13006 from yuwata/network-split-dhcp-12917

networkd: DHCPv6 - separate DHCPv6 options from DHCPv4 options

diff --cc man/systemd.network.xml
Simple merge

diff --cc src/network/networkd-link.c
Simple merge

diff --cc src/network/networkd-network-gperf.gperf
Simple merge

diff --cc src/network/networkd-network.c
Simple merge

diff --cc src/network/networkd-network.h
Simple merge

diff --cc test/fuzz/fuzz-network-parser/directives.network
Simple merge

diff --cc test/test-network/systemd-networkd-tests.py
Simple merge