Merge pull request #18777 from yuwata/network-set-ifname-to-engines

network: set ifname to dhcp4 client or friends

diff --cc src/libsystemd-network/dhcp6-option.c
Simple merge

diff --cc src/libsystemd-network/sd-dhcp-client.c
Simple merge

diff --cc src/libsystemd-network/sd-dhcp-server.c
Simple merge

diff --cc src/libsystemd-network/sd-lldp.c
Simple merge

diff --cc src/libsystemd-network/test-dhcp6-client.c
Simple merge

diff --cc src/systemd/sd-lldp.h
Simple merge