Confirmed fixed in cosmic:
* spun up new fresh cosmic instance
* installed package from -proposed
* checked existence of /run/squid
* rebooted
* checked existence of /usr/lib/tmpfiles.d/squid.conf
Confirmed fixed in cosmic:
* spun up new fresh cosmic instance
* installed package from -proposed
* checked existence of /run/squid
* rebooted
* checked existence of /run/squid
* checked existence of /usr/lib/ tmpfiles. d/squid. conf