Merge pull request #11682 from topimiettinen/private-utsname

core: ProtectHostname feature

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

diff --cc src/core/execute.c
Simple merge

diff --cc src/core/load-fragment-gperf.gperf.m4
Simple merge

diff --cc src/shared/bus-unit-util.c
Simple merge