I'd like to install LPD (Line Printer Daemon) without installing a full CUPS. 
LPD alone is much-much-much smaller than CUPS. 
It's for Raspbian (Debian on Raspberry). 

In Debian, 2 equivalent packages contain the necessary parts for LPD: `rlpr` and `cups-bsd`
Both contain only 4 executables and the related man pages. But they lack the machinery to run LPQ as a daemon when Linux boot.

Creating myself the systemd service file is easy. But is there an "official" way to run a LPQ daemon?