Merge pull request #8175 from keszybz/gc-cleanup

Garbage collection cleanup

diff --cc src/core/load-fragment.c
Simple merge

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

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

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

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

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

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

diff --cc src/core/unit.h
Simple merge