Origin for each line in runshm.init from check-in 2bf099898d:

2bf099898d 2019-10-20        arcade: # vim:ft=make:
2bf099898d 2019-10-20        arcade: 
2bf099898d 2019-10-20        arcade: runshm: cleanvar
2bf099898d 2019-10-20        arcade: 	: Mount and populate /var/run/shm.
2bf099898d 2019-10-20        arcade: 	mkdir -p /var/run/shm
2bf099898d 2019-10-20        arcade: 	mount_tmpfs -m 01777 dummy /var/run/shm
2bf099898d 2019-10-20        arcade: 	mkdir -p -m 01777 /var/run/shm/tmp