Merge pull request #15274 from ssahani/network-issue-9610

DHCP4: Allow lease time to be set when missing from offer

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

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

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

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

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