Merge pull request #14956 from ssahani/delegated-prefix-14474

nettwork: introduce delegated prefix assign

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