Merge pull request #2671 from 0xAX/move-pager-open-to-one-place

tree-wide: merge pager_open_if_enabled() to the pager_open()

diff --cc src/analyze/analyze.c
Simple merge

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

diff --cc src/delta/delta.c
Simple merge

diff --cc src/journal/journalctl.c
Simple merge

diff --cc src/machine/machinectl.c
Simple merge

diff --cc src/network/networkctl.c
Simple merge

diff --cc src/systemctl/systemctl.c
Simple merge