Origin for each line in cleartmp.init.mk from check-in 5621f7a556:

5621f7a556 2019-10-21        arcade: cleartmp: mountlate
5621f7a556 2019-10-21        arcade: 	echo "MRC:$@> Clearing tmp."; \
5621f7a556 2019-10-21        arcade: 	find -x /tmp -mindepth 1 ! -name lost+found \
5621f7a556 2019-10-21        arcade: 	    ! -name snapshots ! -path "./snapshots/*" \
5621f7a556 2019-10-21        arcade: 	    ! -name quota.user ! -name quota.group \
5621f7a556 2019-10-21        arcade: 	    -exec rm -rf -- {} \; -type d -prune); \
5621f7a556 2019-10-21        arcade: 	  rm -f /tmp/.X*-lock; \
5621f7a556 2019-10-21        arcade: 	  rm -fr /tmp/.X11-unix; \
5621f7a556 2019-10-21        arcade: 	  mkdir -m 1777 /tmp/.X11-unix